The Big Bang Theory
Cast & Crew
Johnny Galecki Leonard Hofstadter
Jim Parsons Sheldon Cooper
Kaley Cuoco Penny
Simon Helberg Howard Wolowitz
Kunal Nayyar Raj Koothrappali
Mayim Bialik Amy Farrah Fowler
Melissa Rauch Bernadette Rostenkowski
Chuck Lorre Executive Producer
Bill Prady Executive Producer
Steven Molaro Executive Producer
Mark Cendrowski Director
Anthony Rich Director
Chuck Lorre Screenwriter
Bill Prady Screenwriter
Kristy Cecil Producer
⨁Full Cast & Crew
Upcoming TV Airings
The airings below are based on a generic national schedule. Times and dates can vary by TV provider.
Saturday, December 6
The Vacation Solution
Season 5 • Episode 16
When Sheldon is forced to take a vacation, he goes to work with Amy in her neurobiology lab.
Saturday, December 6
The Codpiece Topology
Season 2 • Episode 2
Leonard rushes into a rebound relationship with Sheldon's nemesis.
Saturday, December 6
The Robotic Manipulation
Season 4 • Episode 1
Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.
Saturday, December 6
The Cruciferous Vegetable Amplification
Season 4 • Episode 2
Sheldon realizes he will not live long enough to download his consciousness into a robot body.
Sunday, December 7
The Zazzy Substitution
Season 4 • Episode 3
When Sheldon searches for an alternative to human companionship, the guys become concerned.
Sunday, December 7
The Hot Troll Deviation
Season 4 • Episode 4
An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.
Sunday, December 7
The Desperation Emanation
Season 4 • Episode 5
Leonard realizes he is the only one in his group without a girlfriend.
Sunday, December 7
The Anything Can Happen Recurrence
Season 7 • Episode 21
Sheldon gives spontaneity a try; Raj asks Howard for help with preparation for a date with Emily.
Sunday, December 7
The Proton Transmogrification
Season 7 • Episode 22
Professor Proton helps Sheldon deal with grief; Leonard gets into a competition with Penny.
Sunday, December 7
The Gorilla Dissolution
Season 7 • Episode 23
A bad day compels Penny to re-evaluate her choices -- including Leonard.
Sunday, December 7
The Status Quo Combustion
Season 7 • Episode 24
Faced with an uncertain future, Sheldon considers a major change.
Sunday, December 7
The Locomotion Interruption
Season 8 • Episode 1
Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny goes for an interview.
Sunday, December 7
The Junior Professor Solution
Season 8 • Episode 2
Amy takes advantage of the tension between Penny and Bernadette.
Sunday, December 7
The First Pitch Insufficiency
Season 8 • Episode 3
Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game.
Sunday, December 7
The Hook-Up Reverberation
Season 8 • Episode 4
Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny.
Sunday, December 7
The Focus Attenuation
Season 8 • Episode 5
During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.
Sunday, December 7
The Expedition Approximation
Season 8 • Episode 6
Raj and Sheldon try to simulate a dark-matter research expedition; Penny and Leonard have a fight.
Sunday, December 7
The Misinterpretation Agitation
Season 8 • Episode 7
The guys try to help when Penny is faced with an awkward dilemma at work.
Sunday, December 7
The Prom Equivalency
Season 8 • Episode 8
Sheldon feels pressured to participate in traditions when the gang re-creates a high-school prom.
Sunday, December 7
The Stag Convergence
Season 5 • Episode 22
Knowledge of Howard's sexual history makes Bernadette reconsider their future together.
Sunday, December 7
The Launch Acceleration
Season 5 • Episode 23
Wedding plans are jeopardized when NASA reschedules Howard's mission; Leonard surprises Penny.
Sunday, December 7
The Countdown Reflection
Season 5 • Episode 24
The gang tries to help Wolowitz and Bernadette get married before the space launch.
Sunday, December 7
The Date Night Variable
Season 6 • Episode 1
Raj faces his loneliness; Wolowitz gets drawn into a fight between Bernadette and his mom.
Sunday, December 7
The Decoupling Fluctuation
Season 6 • Episode 2
Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard.
Sunday, December 7
The Higgs Boson Observation
Season 6 • Episode 3
Amy feels threatened by Sheldon's new assistant; space starts to wear on Wolowitz.
Sunday, December 7
The Re-Entry Minimization
Season 6 • Episode 4
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
Sunday, December 7
The Holographic Excitation
Season 6 • Episode 5
The gang heads to Stuart's comic book store to celebrate Halloween.
Sunday, December 7
The Extract Obliteration
Season 6 • Episode 6
A game threatens Sheldon's relationship with Stephen Hawking; Penny signs up for a college class.
Sunday, December 7
The Habitation Configuration
Season 6 • Episode 7
Sheldon is caught in the middle of Amy and Wil Wheaton's argument.
Sunday, December 7
The Apology Insufficiency
Season 4 • Episode 7
Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.
Monday, December 8
The 21-Second Excitation
Season 4 • Episode 8
The guys camp out for a movie screening; Penny and Bernadette invite Amy to her first slumber party.
Monday, December 8
The Boyfriend Complexity
Season 4 • Episode 9
Penny asks Leonard to lie to her father; an all-nighter at a telescope.
Monday, December 8
The Cohabitation Formulation
Season 4 • Episode 16
Wolowitz considers taking things with Bernadette to the next level.
Monday, December 8
The Alien Parasite Hypothesis
Season 4 • Episode 10
Koothrappali and Wolowitz try to prove who would be a better superhero.
Monday, December 8
The Toast Derivation
Season 4 • Episode 17
Sheldon is upset when he realizes Leonard is the center of their group of friends.
Monday, December 8
The Tenant Disassociation
Season 11 • Episode 19
Leonard decides to run against Sheldon for president of the tenants association.
Monday, December 8
The Reclusive Potential
Season 11 • Episode 20
A brilliant but reclusive scientist invites Sheldon to his cabin in the middle of nowhere.
Monday, December 8
The Comet Polarization
Season 11 • Episode 21
Friendships are threatened when Koothrappali takes credit for Penny's astronomical discovery.
Monday, December 8
The Monetary Insufficiency
Season 11 • Episode 22
Sheldon tries to win money for science; Penny and Bernadette take Amy wedding dress shopping.
Monday, December 8
The Sibling Realignment
Season 11 • Episode 23
Sheldon's mother won't attend his wedding unless he invites his brother.
Monday, December 8
The Bow Tie Asymmetry
Season 11 • Episode 24
Amy's parents and Sheldon's family arrive; nearly everybody is focused on the wedding plans.
Monday, December 8
The Conjugal Configuration
Season 12 • Episode 1
Penny and Leonard discover they are uncomfortably similar to Amy's parents.
Monday, December 8
The Wedding Gift Wormhole
Season 12 • Episode 2
Sheldon and Amy go crazy trying to figure out what Leonard and Penny gave them for their wedding.
Monday, December 8
The Bakersfield Expedition
Season 6 • Episode 13
The guys don costumes and go on a road trip to a comic book convention.
Monday, December 8
The Convergence Convergence
Season 9 • Episode 24
Leonard's recently divorced parents and Sheldon's devoutly religious mother visit.
Monday, December 8
The Spoiler Alert Segmentation
Season 6 • Episode 15
A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements.
Monday, December 8
The Tangible Affection Proof
Season 6 • Episode 16
The guys search for Valentine's Day gifts; Stuart and Raj host a "lonely people" party.
Monday, December 8
The Monster Isolation
Season 6 • Episode 17
Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.
Monday, December 8
The Contractual Obligation Implementation
Season 6 • Episode 18
Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers.
Monday, December 8
The Closet Reconfiguration
Season 6 • Episode 19
Howard considers whether or not he should open a letter from his father.
Monday, December 8
The Tenure Turbulence
Season 6 • Episode 20
The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.
Monday, December 8
The Closure Alternative
Season 6 • Episode 21
Amy tries to help Sheldon get over his need for closure; Raj discovers a secret about Lucy.
Monday, December 8
The Proton Resurgence
Season 6 • Episode 22
Leonard and Sheldon hire the host of their favorite childhood TV show to perform.
Tuesday, December 9
The Love Car Displacement
Season 4 • Episode 13
Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.
Tuesday, December 9
The Thespian Catalyst
Season 4 • Episode 14
Sheldon takes acting lessons from Penny in hope of becoming a better teacher.
Tuesday, December 9
The Bat Jar Conjecture
Season 1 • Episode 13
The guys kick Sheldon off the Physics Bowl team and bring his nemesis aboard.
Tuesday, December 9
The Love Spell Potential
Season 6 • Episode 23
Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons."
Tuesday, December 9
The Bon Voyage Reaction
Season 6 • Episode 24
When Leonard receives an opportunity to work overseas, Penny and Sheldon are thrown for a loop.
Tuesday, December 9
The Hofstadter Insufficiency
Season 7 • Episode 1
Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.
Tuesday, December 9
The Deception Verification
Season 7 • Episode 2
Leonard and Sheldon's friendship is tested; Wolowitz's masculinity is threatened.
Tuesday, December 9
The Scavenger Vortex
Season 7 • Episode 3
Raj designs a scavenger hunt that brings out the best -- and the worst -- in the whole gang.
Tuesday, December 9
The Raiders Minimization
Season 7 • Episode 4
Sheldon wants revenge after Amy ruins one of his favorite films.
Tuesday, December 9
The Conjugal Conjecture
Season 10 • Episode 1
The group deals with the aftermath of Sheldon's mother and Leonard's father's evening together.
Tuesday, December 9
The Romance Resonance
Season 7 • Episode 6
Sheldon's latest scientific breakthrough leaves him feeling like a fraud.
Tuesday, December 9
The Proton Displacement
Season 7 • Episode 7
When Professor Proton asks Leonard for help with an experiment, Sheldon befriends Proton's rival.
Tuesday, December 9
The Itchy Brain Simulation
Season 7 • Episode 8
When a mistake comes to light, Sheldon punishes Leonard; Penny decides to confront Raj's ex.
Tuesday, December 9
The Thanksgiving Decoupling
Season 7 • Episode 9
When the gang decides to spend Thanksgiving at Mrs. Wolowitz's house, Sheldon protests.
Tuesday, December 9
The Discovery Dissipation
Season 7 • Episode 10
Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard.
Tuesday, December 9
The Cooper Extraction
Season 7 • Episode 11
While Sheldon is in Texas, the rest of the gang realize how much he has changed their lives.
Tuesday, December 9
The Toast Derivation
Season 4 • Episode 17
Sheldon is upset when he realizes Leonard is the center of their group of friends.
Wednesday, December 10
The Prestidigitation Approximation
Season 4 • Episode 18
Leonard must choose between Penny and his new girlfriend, Priya.
Wednesday, December 10
The Zarnecki Incursion
Season 4 • Episode 19
The guys try to figure out who hacked Sheldon's online-game account.
Wednesday, December 10
The Zarnecki Incursion
Season 4 • Episode 19
The guys try to figure out who hacked Sheldon's online-game account.
Wednesday, December 10
The Herb Garden Germination
Season 4 • Episode 20
Howard decides to take a big step in his relationship with Bernadette.
Wednesday, December 10
The Hesitation Ramification
Season 7 • Episode 12
Penny asks Leonard a bold question about their relationship; Sheldon wants to learn how to be funny.
Wednesday, December 10
The Occupation Recalibration
Season 7 • Episode 13
Sheldon must learn how to relax when he is forced to take a vacation.
Wednesday, December 10
The Convention Conundrum
Season 7 • Episode 14
Unable to get Comic-Con tickets, Sheldon tries to hold his own convention.
Wednesday, December 10
The Locomotive Manipulation
Season 7 • Episode 15
Sheldon and Amy go on a trip to wine country with Howard and Bernadette.
Wednesday, December 10
The Table Polarization
Season 7 • Episode 16
When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life.
Wednesday, December 10
The Friendship Turbulence
Season 7 • Episode 17
Bernadette tries to negotiate peace between Sheldon and Wolowitz.
Wednesday, December 10
The Military Miniaturization
Season 10 • Episode 2
Wolowitz has a meeting with Colonel Williams, a representative from the Air Force.
Wednesday, December 10
The Agreement Dissection
Season 4 • Episode 21
Priya dissects the roommate agreement; the ladies take Sheldon dancing.
Wednesday, December 10
The Wildebeest Implementation
Season 4 • Episode 22
Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.
Thursday, December 11
The Maternal Congruence
Season 3 • Episode 11
Leonard is horrified when his mother (Christine Baranski) visits.
Thursday, December 11
The Engagement Reaction
Season 4 • Episode 23
Howard's mom winds up in the hospital after hearing news of her son's engagement to Bernadette.
Thursday, December 11
The Rothman Disintegration
Season 5 • Episode 17
Sheldon and Kripke compete for a corner office; Penny receives a gift from Amy.
Thursday, December 11
The Roommate Transmogrification
Season 4 • Episode 24
Bernadette gets her Ph.D., inspiring the guys to tease Wolowitz about his lack of a doctorate.
Thursday, December 11
The Indecision Amalgamation
Season 7 • Episode 19
Raj struggles with guilt when he dates two women at once; Penny has a chance to be in a movie.
Thursday, December 11
The Relationship Diremption
Season 7 • Episode 20
Sheldon has a personal crisis when he decides string theory is a waste of his time.
Thursday, December 11
The Anything Can Happen Recurrence
Season 7 • Episode 21
Sheldon gives spontaneity a try; Raj asks Howard for help with preparation for a date with Emily.
Thursday, December 11
The Proton Transmogrification
Season 7 • Episode 22
Professor Proton helps Sheldon deal with grief; Leonard gets into a competition with Penny.
Thursday, December 11
The Gorilla Dissolution
Season 7 • Episode 23
A bad day compels Penny to re-evaluate her choices -- including Leonard.
Thursday, December 11
The Status Quo Combustion
Season 7 • Episode 24
Faced with an uncertain future, Sheldon considers a major change.
Thursday, December 11
The Cohabitation Experimentation
Season 10 • Episode 4
After her apartment floods, Amy suggests that she and Sheldon move in together.
Thursday, December 11
The Junior Professor Solution
Season 8 • Episode 2
Amy takes advantage of the tension between Penny and Bernadette.
Thursday, December 11
The First Pitch Insufficiency
Season 8 • Episode 3
Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game.
Thursday, December 11
The Hook-Up Reverberation
Season 8 • Episode 4
Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny.
Thursday, December 11
The Focus Attenuation
Season 8 • Episode 5
During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.
Thursday, December 11
The Expedition Approximation
Season 8 • Episode 6
Raj and Sheldon try to simulate a dark-matter research expedition; Penny and Leonard have a fight.
Thursday, December 11
The Misinterpretation Agitation
Season 8 • Episode 7
The guys try to help when Penny is faced with an awkward dilemma at work.
Thursday, December 11
The Prom Equivalency
Season 8 • Episode 8
Sheldon feels pressured to participate in traditions when the gang re-creates a high-school prom.
Thursday, December 11
The Septum Deviation
Season 8 • Episode 9
Leonard has minor surgery on his nose, causing Sheldon to overreact.
Thursday, December 11
The Skank Reflex Analysis
Season 5 • Episode 1
Penny worries that she has ruined her relationship with her friends.
Friday, December 12
The Infestation Hypothesis
Season 5 • Episode 2
Amy is caught in the middle when Penny and Sheldon argue over a pre-owned chair.
Friday, December 12
The Pulled Groin Extrapolation
Season 5 • Episode 3
Bernadette, Howard and Mrs. Wolowitz spend the weekend together.
Friday, December 12
The Re-Entry Minimization
Season 6 • Episode 4
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
Friday, December 12
The Wiggly Finger Catalyst
Season 5 • Episode 4
Raj wants a girlfriend, so Penny introduces him to a woman he can communicate with.
Friday, December 12
The Procreation Calculation
Season 12 • Episode 3
Stuart starts bringing his new girlfriend home; Koothrappali explores an arranged marriage.
Friday, December 12
The Tam Turbulence
Season 12 • Episode 4
Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend.
Friday, December 12
The Planetarium Collision
Season 12 • Episode 5
When Amy doesn't have time to work on super-asymmetry, Sheldon schemes to ensure she's available.
Friday, December 12
The Imitation Perturbation
Season 12 • Episode 6
Sheldon seeks retaliation when Wolowitz dresses up as Sheldon for Halloween.
Friday, December 12
The Grant Allocation Derivation
Season 12 • Episode 7
Leonard struggles when he's given the responsibility of distributing extra grant money.
Friday, December 12
The Consummation Deviation
Season 12 • Episode 8
Sheldon tries to bond with Amy's father; Wolowitz lures Mr. Fowler away with magic tricks.
Friday, December 12
The Citation Negation
Season 12 • Episode 9
Sheldon and Amy are devastated after learning that Super Asymmetry has already been disproved.
Friday, December 12
The VCR Illumination
Season 12 • Episode 10
A VHS tape from Sheldon's past inspires him not to give up; Bernadette tries to help Wolowitz.
Friday, December 12
The Paintball Scattering
Season 12 • Episode 11
Penny and Leonard organize a paintball game, which results in mayhem due to Sheldon's jealousy.
Friday, December 12
The Propagation Proposition
Season 12 • Episode 12
Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help.
Friday, December 12
The Comic Book Store Regeneration
Season 8 • Episode 15
The gang waits for the reopening of the comic book store; Wolowitz gets some shocking news.
Friday, December 12
The Hot Tub Contamination
Season 10 • Episode 5
Things do not run smoothly when Amy moves in with Sheldon, and Leonard and Penny have to intervene.
Friday, December 12
The Russian Rocket Reaction
Season 5 • Episode 5
Wil Wheaton invites Leonard and Sheldon to a party at his house; Howard receives an opportunity.
Friday, December 12
The Rhinitis Revelation
Season 5 • Episode 6
Sheldon finds himself competing with the gang for his mother's attention when she visits.
Saturday, December 13
The Isolation Permutation
Season 5 • Episode 8
Amy is devastated when Penny and Bernadette shop for wedding dresses without her.
Saturday, December 13
The Clean Room Infiltration
Season 8 • Episode 11
Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.
Saturday, December 13
The Cooper/Kripke Inversion
Season 6 • Episode 14
Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke.
Saturday, December 13
The Ornithophobia Diffusion
Season 5 • Episode 9
Leonard and Penny spend time alone; Sheldon tries to face his fear of birds.
Saturday, December 13
The Septum Deviation
Season 8 • Episode 9
Leonard has minor surgery on his nose, causing Sheldon to overreact.
Saturday, December 13
The Champagne Reflection
Season 8 • Episode 10
Howard, Leonard and Raj look through their dead professor's research.
Saturday, December 13
The Clean Room Infiltration
Season 8 • Episode 11
Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.
Saturday, December 13
The Space Probe Disintegration
Season 8 • Episode 12
The guys agree to do something the girls like; Leonard and Sheldon butt heads.
Saturday, December 13
The Anxiety Optimization
Season 8 • Episode 13
Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough.
Saturday, December 13
The Troll Manifestation
Season 8 • Episode 14
Sheldon and Leonard must defend themselves from an online bully's criticism after writing a paper.
Saturday, December 13
The Comic Book Store Regeneration
Season 8 • Episode 15
The gang waits for the reopening of the comic book store; Wolowitz gets some shocking news.
Saturday, December 13
The Intimacy Acceleration
Season 8 • Episode 16
Penny and Sheldon design an experiment -- as a joke -- to make participants fall in love.
Saturday, December 13
The Colonization Application
Season 8 • Episode 17
Amy finds out that Sheldon applied for a one-way mission to colonize Mars.
Saturday, December 13
The Leftover Thermalization
Season 8 • Episode 18
A magazine article only credits Sheldon in an article about a paper he co-wrote with Leonard.
Saturday, December 13
The Skywalker Incursion
Season 8 • Episode 19
While on their way to UC Berkeley, Sheldon and Leonard take a detour in hope of meeting an idol.
Saturday, December 13
The Fortification Implementation
Season 8 • Episode 20
Sheldon and Amy build a blanket fort; Wolowitz meets a half-brother he didn't know he had.
Saturday, December 13
The Graduation Transmission
Season 8 • Episode 22
Wolowitz questions his engineering skills; a canceled flight puts Leonard's plans in jeopardy.
Saturday, December 13
The Cruciferous Vegetable Amplification
Season 4 • Episode 2
Sheldon realizes he will not live long enough to download his consciousness into a robot body.
Saturday, December 13
The Speckerman Recurrence
Season 5 • Episode 11
Leonard must face the bully who targeted him in high school; Penny confronts her past actions.
Saturday, December 13
The Shiny Trinket Maneuver
Season 5 • Episode 12
Amy is upset with Sheldon when he isn't impressed with her recent accomplishment.
Sunday, December 14
The Recombination Hypothesis
Season 5 • Episode 13
Everything could change when Leonard spontaneously invites Penny to a romantic dinner.
Sunday, December 14
The Beta Test Initiation
Season 5 • Episode 14
Penny and Leonard experiment with their new relationship; Raj forms an unusual bond.
Sunday, December 14
The Friendship Contraction
Season 5 • Episode 15
Leonard starts to reconsider his friendship with Sheldon; Wolowitz tries to choose a nickname.
Sunday, December 14
The Communication Deterioration
Season 8 • Episode 21
The guys fight over a message that could be used for alien contact.
Sunday, December 14
The Graduation Transmission
Season 8 • Episode 22
Wolowitz questions his engineering skills; a canceled flight puts Leonard's plans in jeopardy.
Sunday, December 14
The Maternal Combustion
Season 8 • Episode 23
When Sheldon's and Leonard's mothers finally meet, personalities collide.
Sunday, December 14
The Commitment Determination
Season 8 • Episode 24
While facing relationship changes, Sheldon pushes Penny and Leonard to choose a wedding date.
Sunday, December 14
The Matrimonial Momentum
Season 9 • Episode 1
Penny must decide if she can get past Leonard's bad behavior.
Sunday, December 14
The Separation Oscillation
Season 9 • Episode 2
Leonard tries to ease Penny's mind; Sheldon plans a special episode of "Fun With Flags."
Sunday, December 14
The Bachelor Party Corrosion
Season 9 • Episode 3
A flat tire during Leonard's bachelor party weekend in Mexico tests the guys' skills.
Sunday, December 14
The 2003 Approximation
Season 9 • Episode 4
An impending change inspires Sheldon to revert to 2003, before he met Penny and Leonard.
Sunday, December 14
The Perspiration Implementation
Season 9 • Episode 5
Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys.
Sunday, December 14
The Helium Insufficiency
Season 9 • Episode 6
Leonard and Sheldon try to secure the helium they need during a nation-wide shortage.
Sunday, December 14
The Spock Resonance
Season 9 • Episode 7
Sheldon struggles to keep his emotions in check when he is interviewed for a documentary.
Sunday, December 14
The Mystery Date Observation
Season 9 • Episode 8
Sheldon, Wolowitz and Koothrappali post an ad online to find a new girlfriend for Sheldon.
Sunday, December 14
The 2003 Approximation
Season 9 • Episode 4
An impending change inspires Sheldon to revert to 2003, before he met Penny and Leonard.
Sunday, December 14
The Perspiration Implementation
Season 9 • Episode 5
Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys.
Sunday, December 14
The Helium Insufficiency
Season 9 • Episode 6
Leonard and Sheldon try to secure the helium they need during a nation-wide shortage.
Sunday, December 14
The Spock Resonance
Season 9 • Episode 7
Sheldon struggles to keep his emotions in check when he is interviewed for a documentary.
Sunday, December 14
The Mystery Date Observation
Season 9 • Episode 8
Sheldon, Wolowitz and Koothrappali post an ad online to find a new girlfriend for Sheldon.
Sunday, December 14
The Platonic Permutation
Season 9 • Episode 9
Amy and Sheldon spend Thanksgiving at the aquarium -- as friends.
Sunday, December 14
The Earworm Reverberation
Season 9 • Episode 10
Sheldon has a song stuck in his head; despite their awkward date, Amy asks Dave over for dinner.
Sunday, December 14
The Vacation Solution
Season 5 • Episode 16
When Sheldon is forced to take a vacation, he goes to work with Amy in her neurobiology lab.
Sunday, December 14
The Celebration Reverberation
Season 11 • Episode 11
Sheldon plans a dinner for Amy's birthday; Leonard receives a Christmas letter from his brother.
Monday, December 15
The Rothman Disintegration
Season 5 • Episode 17
Sheldon and Kripke compete for a corner office; Penny receives a gift from Amy.
Monday, December 15
The Werewolf Transformation
Season 5 • Episode 18
Sheldon's routine is turned upside down when his barber gets sick.
Monday, December 15
The Prestidigitation Approximation
Season 4 • Episode 18
Leonard must choose between Penny and his new girlfriend, Priya.
Monday, December 15
The Weekend Vortex
Season 5 • Episode 19
Sheldon chooses to participate in a guys-only weekend gaming marathon rather than joining Amy.
Monday, December 15
The Herb Garden Germination
Season 4 • Episode 20
Howard decides to take a big step in his relationship with Bernadette.
Monday, December 15
The Confirmation Polarization
Season 12 • Episode 13
A rival team of physicists tries to take credit for Amy and Sheldon's super asymmetry theory.
Monday, December 15
The Meteorite Manifestation
Season 12 • Episode 14
Leonard is disappointed when his friends exclude him from a scientific project.
Monday, December 15
The Donation Oscillation
Season 12 • Episode 15
Penny tries to throw a wrench into Leonard's plan to be a sperm donor for her ex-boyfriend.
Monday, December 15
The D & D Vortex
Season 12 • Episode 16
The gang fights for the one open seat at Wil Wheaton's celebrity Dungeons and Dragons game.
Monday, December 15
The Conference Valuation
Season 12 • Episode 17
When Penny and Bernadette go to a convention, Wolowitz is left in charge of the kids.
Monday, December 15
The Laureate Accumulation
Season 12 • Episode 18
Sheldon and Amy try to win over Nobel laureates Kip Thorne, George Smoot and Frances Arnold.
Monday, December 15
The Inspiration Deprivation
Season 12 • Episode 19
Wolowitz buys a scooter that looks like the one he had years ago.
Monday, December 15
The Decision Reverberation
Season 12 • Episode 20
Koothrappali publishes a paper that suggests he may have discovered alien life.
Monday, December 15
The Positive Negative Reaction
Season 9 • Episode 16
The gang celebrates news of Bernadette's pregnancy by singing karaoke.
Monday, December 15
The Fetal Kick Catalyst
Season 10 • Episode 6
At a Comic Con event, Penny learns there are fans of her performance in "Serial Ape-ist."
Monday, December 15
The Bath Item Gift Hypothesis
Season 2 • Episode 11
Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
Monday, December 15
The Maternal Congruence
Season 3 • Episode 11
Leonard is horrified when his mother (Christine Baranski) visits.
Monday, December 15
The Santa Simulation
Season 6 • Episode 11
During a game, Sheldon revisits Christmas memories; finding a date for Koothrappali.
Monday, December 15
The Cooper Extraction
Season 7 • Episode 11
While Sheldon is in Texas, the rest of the gang realize how much he has changed their lives.
Monday, December 15
The Clean Room Infiltration
Season 8 • Episode 11
Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.
Monday, December 15
The Holiday Summation
Season 10 • Episode 12
Sheldon and Amy visit Penny and Leonard and tell them about their terrible trip to Texas.
Monday, December 15
The Celebration Experimentation
Season 9 • Episode 17
For the first time in nine years, the gang celebrates Sheldon's birthday.
Monday, December 15
The Application Deterioration
Season 9 • Episode 18
The guys file for a patent on their invention; the girls give dating advice to Koothrappali.
Tuesday, December 16
The Celebration Reverberation
Season 11 • Episode 11
Sheldon plans a dinner for Amy's birthday; Leonard receives a Christmas letter from his brother.
Tuesday, December 16
The Stag Convergence
Season 5 • Episode 22
Knowledge of Howard's sexual history makes Bernadette reconsider their future together.
Tuesday, December 16
The Creepy Candy Coating Corollary
Season 3 • Episode 5
Sheldon seeks revenge on his nemesis; Wolowitz wants Penny to set him up with one of her friends.
Tuesday, December 16
The Solder Excursion Diversion
Season 9 • Episode 19
Sheldon makes a revelation when Amy buys him a new laptop; Leonard and Wolowitz lie to their wives.
Tuesday, December 16
The Big Bear Precipitation
Season 9 • Episode 20
Sheldon shares a secret about Leonard when they go on a weekend trip with Penny and Amy.
Tuesday, December 16
The Viewing Party Combustion
Season 9 • Episode 21
The gang must choose sides when an argument between Sheldon and Leonard turns into a heated debate.
Tuesday, December 16
The Fermentation Bifurcation
Season 9 • Episode 22
The gang runs into Penny's ex while out at a wine bar; Bernadette spends an evening with Sheldon.
Tuesday, December 16
The Line Substitution Solution
Season 9 • Episode 23
Sheldon wants to go to a movie screening, so he pays Stuart to spend the day with Amy.
Tuesday, December 16
The Convergence Convergence
Season 9 • Episode 24
Leonard's recently divorced parents and Sheldon's devoutly religious mother visit.
Tuesday, December 16
The Veracity Elasticity
Season 10 • Episode 7
Amy lies about repairs being made to her apartment so she can continue living with Sheldon.
Tuesday, December 16
The Military Miniaturization
Season 10 • Episode 2
Wolowitz has a meeting with Colonel Williams, a representative from the Air Force.
Tuesday, December 16
The Dependence Transcendence
Season 10 • Episode 3
Sheldon tries an energy drink as the gang races to finish its government project on time.
Tuesday, December 16
The Cohabitation Experimentation
Season 10 • Episode 4
After her apartment floods, Amy suggests that she and Sheldon move in together.
Tuesday, December 16
The Hot Tub Contamination
Season 10 • Episode 5
Things do not run smoothly when Amy moves in with Sheldon, and Leonard and Penny have to intervene.
Tuesday, December 16
The Fetal Kick Catalyst
Season 10 • Episode 6
At a Comic Con event, Penny learns there are fans of her performance in "Serial Ape-ist."
Tuesday, December 16
The Brain Bowl Incubation
Season 10 • Episode 8
After a successful gene experiment, Sheldon is determined to convince Amy they should procreate.
Tuesday, December 16
The Geology Elevation
Season 10 • Episode 9
Sheldon gets jealous when a co-worker wins an award; Wolowitz finds an old invention.
Tuesday, December 16
The Property Division Collision
Season 10 • Episode 10
Sheldon and Leonard divvy up their shared belongings.
Wednesday, December 17
The Decoupling Fluctuation
Season 6 • Episode 2
Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard.
Wednesday, December 17
The Higgs Boson Observation
Season 6 • Episode 3
Amy feels threatened by Sheldon's new assistant; space starts to wear on Wolowitz.
Wednesday, December 17
The Robotic Manipulation
Season 4 • Episode 1
Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.
Wednesday, December 17
The Veracity Elasticity
Season 10 • Episode 7
Amy lies about repairs being made to her apartment so she can continue living with Sheldon.
Wednesday, December 17
The Birthday Synchronicity
Season 10 • Episode 11
Bernadette and Howard welcome their baby; Amy celebrates her birthday with Sheldon.
Wednesday, December 17
The Holiday Summation
Season 10 • Episode 12
Sheldon and Amy visit Penny and Leonard and tell them about their terrible trip to Texas.
Wednesday, December 17
The Romance Recalibration
Season 10 • Episode 13
Penny and Amy go on a spa weekend; Wolowitz and Koothrappali try to fix a squeaky floorboard.
Wednesday, December 17
The Emotion Detection Automation
Season 10 • Episode 14
Sheldon tests an MIT invention after hearing it can help him read people's emotions.
Wednesday, December 17
The Locomotion Reverberation
Season 10 • Episode 15
Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system.
Wednesday, December 17
The Brain Bowl Incubation
Season 10 • Episode 8
After a successful gene experiment, Sheldon is determined to convince Amy they should procreate.
Wednesday, December 17
The Earworm Reverberation
Season 9 • Episode 10
Sheldon has a song stuck in his head; despite their awkward date, Amy asks Dave over for dinner.
Wednesday, December 17
The Habitation Configuration
Season 6 • Episode 7
Sheldon is caught in the middle of Amy and Wil Wheaton's argument.
Thursday, December 18
The 43 Peculiarity
Season 6 • Episode 8
Raj and Howard try to figure out why Sheldon disappears at 2:45 every afternoon.
Thursday, December 18
The Parking Spot Escalation
Season 6 • Episode 9
Sheldon and Wolowitz's fight over a parking spot at the university impacts the whole gang.
Thursday, December 18
The Desperation Emanation
Season 4 • Episode 5
Leonard realizes he is the only one in his group without a girlfriend.
Thursday, December 18
The Comic-Con Conundrum
Season 10 • Episode 17
Koothrappali asks Sheldon to help him get out of debt; Penny considers joining Leonard at Comic-Con.
Thursday, December 18
The Escape Hatch Identification
Season 10 • Episode 18
Leonard and Penny offer Sheldon's old room to Raj after he moves out of his apartment.
Thursday, December 18
The Collaboration Fluctuation
Season 10 • Episode 19
Leonard, Penny and Raj adjust to their new arrangement; Sheldon expresses interest in Amy's work.
Thursday, December 18
The Recollection Dissipation
Season 10 • Episode 20
Sheldon collaborates on too many projects; Bernadette nears the end of her maternity leave.
Thursday, December 18
The Separation Agitation
Season 10 • Episode 21
Howard and Bernadette struggle to leave Halley in day care; Bert introduces his new girlfriend.
Thursday, December 18
The Cognition Regeneration
Season 10 • Episode 22
Leonard has concerns when Penny considers accepting a job offer from Zack, her ex-boyfriend.
Thursday, December 18
The Geology Elevation
Season 10 • Episode 9
Sheldon gets jealous when a co-worker wins an award; Wolowitz finds an old invention.
Thursday, December 18
The Long Distance Dissonance
Season 10 • Episode 24
Sheldon's former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.
Thursday, December 18
The Proposal Proposal
Season 11 • Episode 1
Amy answers Sheldon's marriage proposal; Howard and Bernadette struggle with unexpected news.
Thursday, December 18
The Retraction Reaction
Season 11 • Episode 2
Leonard's job is at stake after he gives an embarrassing radio interview; Amy and Bernadette bond.
Thursday, December 18
The Relaxation Integration
Season 11 • Episode 3
As Sheldon stresses about picking a wedding date, Amy tells him he can be more easygoing.
Thursday, December 18
The Explosion Implosion
Season 11 • Episode 4
Wolowitz and Sheldon bond over having disappointing fathers; Leonard's mother befriends Penny.
Thursday, December 18
The Collaboration Contamination
Season 11 • Episode 5
Penny and Leonard learn a secret from an unlikely source about dealing with Sheldon.
Thursday, December 18
The Proton Regeneration
Season 11 • Episode 6
Sheldon auditions for the role of the new Professor Proton; Penny takes care of Halley.
Thursday, December 18
The Geology Methodology
Season 11 • Episode 7
Sheldon tries to keep his collaboration with Bert a secret; Penny and Bernadette coach Koothrappali.
Friday, December 19
The Bakersfield Expedition
Season 6 • Episode 13
The guys don costumes and go on a road trip to a comic book convention.
Friday, December 19
The Cooper/Kripke Inversion
Season 6 • Episode 14
Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke.
Friday, December 19
The Recombination Hypothesis
Season 5 • Episode 13
Everything could change when Leonard spontaneously invites Penny to a romantic dinner.
Friday, December 19
The Plagiarism Schism
Season 12 • Episode 21
Kripke has proof that Dr. Pemberton plagiarized his thesis in college.
Friday, December 19
The Maternal Conclusion
Season 12 • Episode 22
Leonard is pleasantly surprised when Beverly comes to visit and she's genuinely kind to him.
Friday, December 19
The Change Constant
Season 12 • Episode 23
Sheldon and Amy await big news.
Friday, December 19
The Stockholm Syndrome
Season 12 • Episode 24
Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret.
Friday, December 19
The Justice League Recombination
Season 4 • Episode 11
The guys try to bond with Penny's new boyfriend through a costume contest.
Friday, December 19
The Separation Oscillation
Season 9 • Episode 2
Leonard tries to ease Penny's mind; Sheldon plans a special episode of "Fun With Flags."
Friday, December 19
The Platonic Permutation
Season 9 • Episode 9
Amy and Sheldon spend Thanksgiving at the aquarium -- as friends.
Friday, December 19
The Earworm Reverberation
Season 9 • Episode 10
Sheldon has a song stuck in his head; despite their awkward date, Amy asks Dave over for dinner.
Friday, December 19
The Locomotion Reverberation
Season 10 • Episode 15
Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system.
Friday, December 19
The Long Distance Dissonance
Season 10 • Episode 24
Sheldon's former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.
Friday, December 19
The Property Division Collision
Season 10 • Episode 10
Sheldon and Leonard divvy up their shared belongings.
Friday, December 19
The Long Distance Dissonance
Season 10 • Episode 24
Sheldon's former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.
Friday, December 19
The Monster Isolation
Season 6 • Episode 17
Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.
Saturday, December 20
The Contractual Obligation Implementation
Season 6 • Episode 18
Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers.
Saturday, December 20
The Closet Reconfiguration
Season 6 • Episode 19
Howard considers whether or not he should open a letter from his father.
Saturday, December 20
The Contractual Obligation Implementation
Season 6 • Episode 18
Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers.
Saturday, December 20
The Solo Oscillation
Season 11 • Episode 13
Sheldon kicks Amy out to work solo; Amy and Leonard bond during a series of science experiments.
Saturday, December 20
The Separation Triangulation
Season 11 • Episode 14
Koothrappali learns the woman he's dating has a very upset husband; Sheldon rents his old room.
Saturday, December 20
The Novelization Correlation
Season 11 • Episode 15
Sheldon petitions Wil Wheaton to appear on his show, but Wil offers a role to Amy instead.
Saturday, December 20
The Platonic Permutation
Season 9 • Episode 9
Amy and Sheldon spend Thanksgiving at the aquarium -- as friends.
Saturday, December 20
The Earworm Reverberation
Season 9 • Episode 10
Sheldon has a song stuck in his head; despite their awkward date, Amy asks Dave over for dinner.
Saturday, December 20
The Opening Night Excitation
Season 9 • Episode 11
After dating for more than five years, Amy and Sheldon spend the night together for the first time.
Saturday, December 20
The Sales Call Sublimination
Season 9 • Episode 12
Leonard meets with a psychiatrist; Wolowitz and Bernadette struggle when Stuart moves out.
Saturday, December 20
The Empathy Optimization
Season 9 • Episode 13
Leonard, Penny and the gang attempt to treat themselves to a Sheldon-free weekend.
Saturday, December 20
The Meemaw Materialization
Season 9 • Episode 14
Sheldon's excitement about his Meemaw's visit fades when she butts heads with Amy.
Saturday, December 20
The Valentino Submergence
Season 9 • Episode 15
Amy and Sheldon host a Valentine's Day edition of Fun With Flags; Raj is torn between two women.
Saturday, December 20
The Positive Negative Reaction
Season 9 • Episode 16
The gang celebrates news of Bernadette's pregnancy by singing karaoke.
Saturday, December 20
The Celebration Experimentation
Season 9 • Episode 17
For the first time in nine years, the gang celebrates Sheldon's birthday.
Saturday, December 20
The Application Deterioration
Season 9 • Episode 18
The guys file for a patent on their invention; the girls give dating advice to Koothrappali.
Saturday, December 20
The Solder Excursion Diversion
Season 9 • Episode 19
Sheldon makes a revelation when Amy buys him a new laptop; Leonard and Wolowitz lie to their wives.
Saturday, December 20
The Big Bear Precipitation
Season 9 • Episode 20
Sheldon shares a secret about Leonard when they go on a weekend trip with Penny and Amy.
Saturday, December 20
The Bat Jar Conjecture
Season 1 • Episode 13
The guys kick Sheldon off the Physics Bowl team and bring his nemesis aboard.
Saturday, December 20
The Proton Resurgence
Season 6 • Episode 22
Leonard and Sheldon hire the host of their favorite childhood TV show to perform.
Saturday, December 20
The Love Spell Potential
Season 6 • Episode 23
Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons."
Sunday, December 21
The Bon Voyage Reaction
Season 6 • Episode 24
When Leonard receives an opportunity to work overseas, Penny and Sheldon are thrown for a loop.
Sunday, December 21
The Hofstadter Insufficiency
Season 7 • Episode 1
Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.
Sunday, December 21
The Deception Verification
Season 7 • Episode 2
Leonard and Sheldon's friendship is tested; Wolowitz's masculinity is threatened.
Sunday, December 21
The Viewing Party Combustion
Season 9 • Episode 21
The gang must choose sides when an argument between Sheldon and Leonard turns into a heated debate.
Sunday, December 21
The Fermentation Bifurcation
Season 9 • Episode 22
The gang runs into Penny's ex while out at a wine bar; Bernadette spends an evening with Sheldon.
Sunday, December 21
The Line Substitution Solution
Season 9 • Episode 23
Sheldon wants to go to a movie screening, so he pays Stuart to spend the day with Amy.
Sunday, December 21
The Convergence Convergence
Season 9 • Episode 24
Leonard's recently divorced parents and Sheldon's devoutly religious mother visit.
Sunday, December 21
The Conjugal Conjecture
Season 10 • Episode 1
The group deals with the aftermath of Sheldon's mother and Leonard's father's evening together.
Sunday, December 21
The Military Miniaturization
Season 10 • Episode 2
Wolowitz has a meeting with Colonel Williams, a representative from the Air Force.
Sunday, December 21
The Dependence Transcendence
Season 10 • Episode 3
Sheldon tries an energy drink as the gang races to finish its government project on time.
Sunday, December 21
The Cohabitation Experimentation
Season 10 • Episode 4
After her apartment floods, Amy suggests that she and Sheldon move in together.
Sunday, December 21
The Hot Tub Contamination
Season 10 • Episode 5
Things do not run smoothly when Amy moves in with Sheldon, and Leonard and Penny have to intervene.
Sunday, December 21
The Fetal Kick Catalyst
Season 10 • Episode 6
At a Comic Con event, Penny learns there are fans of her performance in "Serial Ape-ist."
Sunday, December 21
The Veracity Elasticity
Season 10 • Episode 7
Amy lies about repairs being made to her apartment so she can continue living with Sheldon.
Sunday, December 21
The Brain Bowl Incubation
Season 10 • Episode 8
After a successful gene experiment, Sheldon is determined to convince Amy they should procreate.
Sunday, December 21
The Holiday Summation
Season 10 • Episode 12
Sheldon and Amy visit Penny and Leonard and tell them about their terrible trip to Texas.
Sunday, December 21
The Scavenger Vortex
Season 7 • Episode 3
Raj designs a scavenger hunt that brings out the best -- and the worst -- in the whole gang.
Sunday, December 21
The Raiders Minimization
Season 7 • Episode 4
Sheldon wants revenge after Amy ruins one of his favorite films.
Monday, December 22
The Workplace Proximity
Season 7 • Episode 5
Sheldon and Amy's relationship is tested when she takes a job at his university.
Monday, December 22
The Romance Resonance
Season 7 • Episode 6
Sheldon's latest scientific breakthrough leaves him feeling like a fraud.
Monday, December 22
The Agreement Dissection
Season 4 • Episode 21
Priya dissects the roommate agreement; the ladies take Sheldon dancing.
Monday, December 22
The Wildebeest Implementation
Season 4 • Episode 22
Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.
Monday, December 22
The Comet Polarization
Season 11 • Episode 21
Friendships are threatened when Koothrappali takes credit for Penny's astronomical discovery.
Monday, December 22
The Monetary Insufficiency
Season 11 • Episode 22
Sheldon tries to win money for science; Penny and Bernadette take Amy wedding dress shopping.
Monday, December 22
The Sibling Realignment
Season 11 • Episode 23
Sheldon's mother won't attend his wedding unless he invites his brother.
Monday, December 22
The Bow Tie Asymmetry
Season 11 • Episode 24
Amy's parents and Sheldon's family arrive; nearly everybody is focused on the wedding plans.
Monday, December 22
The Conjugal Configuration
Season 12 • Episode 1
Penny and Leonard discover they are uncomfortably similar to Amy's parents.
Monday, December 22
The Wedding Gift Wormhole
Season 12 • Episode 2
Sheldon and Amy go crazy trying to figure out what Leonard and Penny gave them for their wedding.
Monday, December 22
The Birthday Synchronicity
Season 10 • Episode 11
Bernadette and Howard welcome their baby; Amy celebrates her birthday with Sheldon.
Monday, December 22
The Tam Turbulence
Season 12 • Episode 4
Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend.
Monday, December 22
The Planetarium Collision
Season 12 • Episode 5
When Amy doesn't have time to work on super-asymmetry, Sheldon schemes to ensure she's available.
Monday, December 22
The Imitation Perturbation
Season 12 • Episode 6
Sheldon seeks retaliation when Wolowitz dresses up as Sheldon for Halloween.
Monday, December 22
The Grant Allocation Derivation
Season 12 • Episode 7
Leonard struggles when he's given the responsibility of distributing extra grant money.
Monday, December 22
The Consummation Deviation
Season 12 • Episode 8
Sheldon tries to bond with Amy's father; Wolowitz lures Mr. Fowler away with magic tricks.
Monday, December 22
The Citation Negation
Season 12 • Episode 9
Sheldon and Amy are devastated after learning that Super Asymmetry has already been disproved.
Monday, December 22
The Bath Item Gift Hypothesis
Season 2 • Episode 11
Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
Monday, December 22
The Maternal Congruence
Season 3 • Episode 11
Leonard is horrified when his mother (Christine Baranski) visits.
Tuesday, December 23
The Itchy Brain Simulation
Season 7 • Episode 8
When a mistake comes to light, Sheldon punishes Leonard; Penny decides to confront Raj's ex.
Tuesday, December 23
The Discovery Dissipation
Season 7 • Episode 10
Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard.
Tuesday, December 23
The Bath Item Gift Hypothesis
Season 2 • Episode 11
Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
Tuesday, December 23
The VCR Illumination
Season 12 • Episode 10
A VHS tape from Sheldon's past inspires him not to give up; Bernadette tries to help Wolowitz.
Tuesday, December 23
The Paintball Scattering
Season 12 • Episode 11
Penny and Leonard organize a paintball game, which results in mayhem due to Sheldon's jealousy.
Tuesday, December 23
The Propagation Proposition
Season 12 • Episode 12
Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help.
Tuesday, December 23
The Confirmation Polarization
Season 12 • Episode 13
A rival team of physicists tries to take credit for Amy and Sheldon's super asymmetry theory.
Tuesday, December 23
The Meteorite Manifestation
Season 12 • Episode 14
Leonard is disappointed when his friends exclude him from a scientific project.
Tuesday, December 23
The Donation Oscillation
Season 12 • Episode 15
Penny tries to throw a wrench into Leonard's plan to be a sperm donor for her ex-boyfriend.
Tuesday, December 23
The Romance Recalibration
Season 10 • Episode 13
Penny and Amy go on a spa weekend; Wolowitz and Koothrappali try to fix a squeaky floorboard.
Tuesday, December 23
The Conference Valuation
Season 12 • Episode 17
When Penny and Bernadette go to a convention, Wolowitz is left in charge of the kids.
Tuesday, December 23
The Laureate Accumulation
Season 12 • Episode 18
Sheldon and Amy try to win over Nobel laureates Kip Thorne, George Smoot and Frances Arnold.
Tuesday, December 23
The Inspiration Deprivation
Season 12 • Episode 19
Wolowitz buys a scooter that looks like the one he had years ago.
Tuesday, December 23
The Decision Reverberation
Season 12 • Episode 20
Koothrappali publishes a paper that suggests he may have discovered alien life.
Tuesday, December 23
The Plagiarism Schism
Season 12 • Episode 21
Kripke has proof that Dr. Pemberton plagiarized his thesis in college.
Tuesday, December 23
The Maternal Conclusion
Season 12 • Episode 22
Leonard is pleasantly surprised when Beverly comes to visit and she's genuinely kind to him.
Tuesday, December 23
The Change Constant
Season 12 • Episode 23
Sheldon and Amy await big news.
Tuesday, December 23
The Stockholm Syndrome
Season 12 • Episode 24
Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret.
Wednesday, December 24
The Hesitation Ramification
Season 7 • Episode 12
Penny asks Leonard a bold question about their relationship; Sheldon wants to learn how to be funny.
Wednesday, December 24
The Occupation Recalibration
Season 7 • Episode 13
Sheldon must learn how to relax when he is forced to take a vacation.
Wednesday, December 24
The Maternal Congruence
Season 3 • Episode 11
Leonard is horrified when his mother (Christine Baranski) visits.
Wednesday, December 24
The Robotic Manipulation
Season 4 • Episode 1
Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.
Wednesday, December 24
The Cruciferous Vegetable Amplification
Season 4 • Episode 2
Sheldon realizes he will not live long enough to download his consciousness into a robot body.
Wednesday, December 24
The Zazzy Substitution
Season 4 • Episode 3
When Sheldon searches for an alternative to human companionship, the guys become concerned.
Wednesday, December 24
The Hot Troll Deviation
Season 4 • Episode 4
An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.
Wednesday, December 24
The Desperation Emanation
Season 4 • Episode 5
Leonard realizes he is the only one in his group without a girlfriend.
Wednesday, December 24
The Irish Pub Formulation
Season 4 • Episode 6
Leonard keeps an affair a secret from Sheldon, Howard and Raj.
Wednesday, December 24
The Apology Insufficiency
Season 4 • Episode 7
Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.
Wednesday, December 24
The 21-Second Excitation
Season 4 • Episode 8
The guys camp out for a movie screening; Penny and Bernadette invite Amy to her first slumber party.
Wednesday, December 24
The Boyfriend Complexity
Season 4 • Episode 9
Penny asks Leonard to lie to her father; an all-nighter at a telescope.
Wednesday, December 24
The Alien Parasite Hypothesis
Season 4 • Episode 10
Koothrappali and Wolowitz try to prove who would be a better superhero.
Wednesday, December 24
The Justice League Recombination
Season 4 • Episode 11
The guys try to bond with Penny's new boyfriend through a costume contest.
Wednesday, December 24
The Bus Pants Utilization
Season 4 • Episode 12
Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.
Wednesday, December 24
The Bath Item Gift Hypothesis
Season 2 • Episode 11
Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
Wednesday, December 24
The Maternal Congruence
Season 3 • Episode 11
Leonard is horrified when his mother (Christine Baranski) visits.
Wednesday, December 24
The Santa Simulation
Season 6 • Episode 11
During a game, Sheldon revisits Christmas memories; finding a date for Koothrappali.
Wednesday, December 24
The Cooper Extraction
Season 7 • Episode 11
While Sheldon is in Texas, the rest of the gang realize how much he has changed their lives.
Wednesday, December 24
The Clean Room Infiltration
Season 8 • Episode 11
Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.
Wednesday, December 24
The Holiday Summation
Season 10 • Episode 12
Sheldon and Amy visit Penny and Leonard and tell them about their terrible trip to Texas.
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Ask Matt: ‘Big Bang’ and ‘Thrones’ Finales, High Road for ‘Arrow,’ Drowning Sorrows Over ‘Whiskey’
Spoiler Alert
‘Big Bang Theory’ Bosses on That Jaw-Dropping Series Finale Guest Star and More
Finale
In Their Own Words: The ‘Big Bang Theory’ Cast on the Emotional Ending
Worth Watching: ‘Big Bang’ Grand Finale and Significant Others (‘Sheldon,’ ‘Better Things,’ ‘Grey’s’)
Q&A
5 Questions With ‘The Big Bang Theory’ Star Melissa Rauch
‘Big Bang Theory’: First Look at the Emotional Two-Part Series Finale (PHOTOS)
TV Insider Podcast: A Farewell ‘Big Bang Theory’ Roundtable — Plus, Matt Roush’s Tribute
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