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
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.
Thursday, April 16
The Alien Parasite Hypothesis
Season 4 • Episode 10
Koothrappali and Wolowitz try to prove who would be a better superhero.
Thursday, April 16
The Justice League Recombination
Season 4 • Episode 11
The guys try to bond with Penny's new boyfriend through a costume contest.
Thursday, April 16
The Bus Pants Utilization
Season 4 • Episode 12
Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.
Thursday, April 16
The Love Car Displacement
Season 4 • Episode 13
Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.
Thursday, April 16
The Thespian Catalyst
Season 4 • Episode 14
Sheldon takes acting lessons from Penny in hope of becoming a better teacher.
Thursday, April 16
The Benefactor Factor
Season 4 • Episode 15
A wealthy donor makes Leonard question what he is willing to do for science.
Thursday, April 16
The Ornithophobia Diffusion
Season 5 • Episode 9
Leonard and Penny spend time alone; Sheldon tries to face his fear of birds.
Thursday, April 16
The Flaming Spittoon Acquisition
Season 5 • Episode 10
Sheldon is jealous when Stuart, from the comic book store, asks Amy out on a date.
Friday, April 17
The Speckerman Recurrence
Season 5 • Episode 11
Leonard must face the bully who targeted him in high school; Penny confronts her past actions.
Friday, April 17
The Weekend Vortex
Season 5 • Episode 19
Sheldon chooses to participate in a guys-only weekend gaming marathon rather than joining Amy.
Friday, April 17
The Hesitation Ramification
Season 7 • Episode 12
Penny asks Leonard a bold question about their relationship; Sheldon wants to learn how to be funny.
Friday, April 17
The Occupation Recalibration
Season 7 • Episode 13
Sheldon must learn how to relax when he is forced to take a vacation.
Friday, April 17
The Convention Conundrum
Season 7 • Episode 14
Unable to get Comic-Con tickets, Sheldon tries to hold his own convention.
Friday, April 17
The Locomotive Manipulation
Season 7 • Episode 15
Sheldon and Amy go on a trip to wine country with Howard and Bernadette.
Friday, April 17
The Table Polarization
Season 7 • Episode 16
When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life.
Friday, April 17
The Friendship Turbulence
Season 7 • Episode 17
Bernadette tries to negotiate peace between Sheldon and Wolowitz.
Friday, April 17
The Mommy Observation
Season 7 • Episode 18
Sheldon is faced with a new reality when he visits his mom in Houston.
Friday, April 17
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.
Friday, April 17
The Agreement Dissection
Season 4 • Episode 21
Priya dissects the roommate agreement; the ladies take Sheldon dancing.
Friday, April 17
The Wildebeest Implementation
Season 4 • Episode 22
Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.
Friday, April 17
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.
Friday, April 17
The Shiny Trinket Maneuver
Season 5 • Episode 12
Amy is upset with Sheldon when he isn't impressed with her recent accomplishment.
Friday, April 17
The Recombination Hypothesis
Season 5 • Episode 13
Everything could change when Leonard spontaneously invites Penny to a romantic dinner.
Friday, April 17
The Beta Test Initiation
Season 5 • Episode 14
Penny and Leonard experiment with their new relationship; Raj forms an unusual bond.
Friday, April 17
The Friendship Contraction
Season 5 • Episode 15
Leonard starts to reconsider his friendship with Sheldon; Wolowitz tries to choose a nickname.
Saturday, April 18
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, April 18
The Transporter Malfunction
Season 5 • Episode 20
After receiving new "Star Trek" collectibles, Sheldon finds himself haunted by Mr. Spock.
Saturday, April 18
The Shiny Trinket Maneuver
Season 5 • Episode 12
Amy is upset with Sheldon when he isn't impressed with her recent accomplishment.
Saturday, April 18
The Recombination Hypothesis
Season 5 • Episode 13
Everything could change when Leonard spontaneously invites Penny to a romantic dinner.
Saturday, April 18
The Big Bran Hypothesis
Season 1 • Episode 2
Leonard volunteers to sign for a package, hoping to make a good impression on Penny.
Saturday, April 18
The Hamburger Postulate
Season 1 • Episode 5
Leonard, trying to get over Penny, has an unexpected encounter with a fellow scientist.
Saturday, April 18
The Bath Item Gift Hypothesis
Season 2 • Episode 11
Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
Saturday, April 18
The Vegas Renormalization
Season 2 • Episode 21
Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon gets locked out of his apartment.
Saturday, April 18
The Rothman Disintegration
Season 5 • Episode 17
Sheldon and Kripke compete for a corner office; Penny receives a gift from Amy.
Saturday, April 18
The Good Guy Fluctuation
Season 5 • Episode 7
An attractive comic book artist tests Leonard and Priya's relationship.
Saturday, April 18
The Werewolf Transformation
Season 5 • Episode 18
Sheldon's routine is turned upside down when his barber gets sick.
Saturday, April 18
The Weekend Vortex
Season 5 • Episode 19
Sheldon chooses to participate in a guys-only weekend gaming marathon rather than joining Amy.
Saturday, April 18
The Transporter Malfunction
Season 5 • Episode 20
After receiving new "Star Trek" collectibles, Sheldon finds himself haunted by Mr. Spock.
Sunday, April 19
The Hawking Excitation
Season 5 • Episode 21
When Wolowitz works with Stephen Hawking, Sheldon is determined to meet the famous scientist.
Sunday, April 19
The Confirmation Polarization
Season 12 • Episode 13
A rival team of physicists tries to take credit for Amy and Sheldon's super asymmetry theory.
Sunday, April 19
The Meteorite Manifestation
Season 12 • Episode 14
Leonard is disappointed when his friends exclude him from a scientific project.
Sunday, April 19
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.
Sunday, April 19
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.
Sunday, April 19
The Conference Valuation
Season 12 • Episode 17
When Penny and Bernadette go to a convention, Wolowitz is left in charge of the kids.
Sunday, April 19
The Laureate Accumulation
Season 12 • Episode 18
Sheldon and Amy try to win over Nobel laureates Kip Thorne, George Smoot and Frances Arnold.
Sunday, April 19
The Inspiration Deprivation
Season 12 • Episode 19
Wolowitz buys a scooter that looks like the one he had years ago.
Sunday, April 19
The Decision Reverberation
Season 12 • Episode 20
Koothrappali publishes a paper that suggests he may have discovered alien life.
Sunday, April 19
The Plagiarism Schism
Season 12 • Episode 21
Kripke has proof that Dr. Pemberton plagiarized his thesis in college.
Sunday, April 19
The Maternal Conclusion
Season 12 • Episode 22
Leonard is pleasantly surprised when Beverly comes to visit, and she's genuinely kind to him.
Sunday, April 19
The Infestation Hypothesis
Season 5 • Episode 2
Amy is caught in the middle when Penny and Sheldon argue over a pre-owned chair.
Sunday, April 19
The Pulled Groin Extrapolation
Season 5 • Episode 3
Bernadette, Howard and Mrs. Wolowitz spend the weekend together.
Sunday, April 19
The Wiggly Finger Catalyst
Season 5 • Episode 4
Raj wants a girlfriend, so Penny introduces him to a woman he can communicate with.
Sunday, April 19
The Russian Rocket Reaction
Season 5 • Episode 5
Wil Wheaton invites Leonard and Sheldon to a party at his house; Howard receives an opportunity.
Sunday, April 19
The Rhinitis Revelation
Season 5 • Episode 6
Sheldon finds himself competing with the gang for his mother's attention when she visits.
Sunday, April 19
The Good Guy Fluctuation
Season 5 • Episode 7
An attractive comic book artist tests Leonard and Priya's relationship.
Sunday, April 19
The Isolation Permutation
Season 5 • Episode 8
Amy is devastated when Penny and Bernadette shop for wedding dresses without her.
Sunday, April 19
The Stag Convergence
Season 5 • Episode 22
Knowledge of Howard's sexual history makes Bernadette reconsider their future together.
Sunday, April 19
The Ornithophobia Diffusion
Season 5 • Episode 9
Leonard and Penny spend time alone; Sheldon tries to face his fear of birds.
Sunday, April 19
The Launch Acceleration
Season 5 • Episode 23
Wedding plans are jeopardized when NASA reschedules Howard's mission; Leonard surprises Penny.
Sunday, April 19
The Flaming Spittoon Acquisition
Season 5 • Episode 10
Sheldon is jealous when Stuart, from the comic book store, asks Amy out on a date.
Sunday, April 19
The Countdown Reflection
Season 5 • Episode 24
The gang tries to help Wolowitz and Bernadette get married before the space launch.
Sunday, April 19
The Speckerman Recurrence
Season 5 • Episode 11
Leonard must face the bully who targeted him in high school; Penny confronts her past actions.
Sunday, April 19
The Date Night Variable
Season 6 • Episode 1
Raj faces his loneliness; Wolowitz gets drawn into a fight between Bernadette and his mom.
Monday, April 20
The Decoupling Fluctuation
Season 6 • Episode 2
Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard.
Monday, April 20
The Septum Deviation
Season 8 • Episode 9
Leonard has minor surgery on his nose, causing Sheldon to overreact.
Monday, April 20
The Champagne Reflection
Season 8 • Episode 10
Howard, Leonard and Raj look through their dead professor's research.
Monday, April 20
The Relationship Diremption
Season 7 • Episode 20
Sheldon has a personal crisis when he decides string theory is a waste of his time.
Monday, April 20
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.
Monday, April 20
The Proton Transmogrification
Season 7 • Episode 22
Professor Proton helps Sheldon deal with grief; Leonard gets into a competition with Penny.
Monday, April 20
The Gorilla Dissolution
Season 7 • Episode 23
A bad day compels Penny to re-evaluate her choices -- including Leonard.
Monday, April 20
The Status Quo Combustion
Season 7 • Episode 24
Faced with an uncertain future, Sheldon considers a major change.
Monday, April 20
The Locomotion Interruption
Season 8 • Episode 1
Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny goes for an interview.
Monday, April 20
The Junior Professor Solution
Season 8 • Episode 2
Amy takes advantage of the tension between Penny and Bernadette.
Monday, April 20
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.
Monday, April 20
The Weekend Vortex
Season 5 • Episode 19
Sheldon chooses to participate in a guys-only weekend gaming marathon rather than joining Amy.
Monday, April 20
The White Asparagus Triangulation
Season 2 • Episode 9
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
Monday, April 20
The Stag Convergence
Season 5 • Episode 22
Knowledge of Howard's sexual history makes Bernadette reconsider their future together.
Monday, April 20
The Launch Acceleration
Season 5 • Episode 23
Wedding plans are jeopardized when NASA reschedules Howard's mission; Leonard surprises Penny.
Monday, April 20
The Date Night Variable
Season 6 • Episode 1
Raj faces his loneliness; Wolowitz gets drawn into a fight between Bernadette and his mom.
Monday, April 20
The Decoupling Fluctuation
Season 6 • Episode 2
Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard.
Monday, April 20
The Extract Obliteration
Season 6 • Episode 6
A game threatens Sheldon's relationship with Stephen Hawking; Penny signs up for a college class.
Monday, April 20
The Habitation Configuration
Season 6 • Episode 7
Sheldon is caught in the middle of Amy and Wil Wheaton's argument.
Tuesday, April 21
The 43 Peculiarity
Season 6 • Episode 8
Raj and Howard try to figure out why Sheldon disappears at 2:45 every afternoon.
Tuesday, April 21
The Hawking Excitation
Season 5 • Episode 21
When Wolowitz works with Stephen Hawking, Sheldon is determined to meet the famous scientist.
Tuesday, April 21
The Higgs Boson Observation
Season 6 • Episode 3
Amy feels threatened by Sheldon's new assistant; space starts to wear on Wolowitz.
Tuesday, April 21
The Re-Entry Minimization
Season 6 • Episode 4
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
Tuesday, April 21
The Holographic Excitation
Season 6 • Episode 5
The gang heads to Stuart's comic book store to celebrate Halloween.
Tuesday, April 21
The Extract Obliteration
Season 6 • Episode 6
A game threatens Sheldon's relationship with Stephen Hawking; Penny signs up for a college class.
Tuesday, April 21
The Vartabedian Conundrum
Season 2 • Episode 10
Leonard asks Penny for advice when his new relationship starts moving too fast.
Tuesday, April 21
The Parking Spot Escalation
Season 6 • Episode 9
Sheldon and Wolowitz's fight over a parking spot at the university impacts the whole gang.
Tuesday, April 21
The Fish Guts Displacement
Season 6 • Episode 10
When Amy gets sick, Sheldon tries to nurse her back to health.
Tuesday, April 21
The Santa Simulation
Season 6 • Episode 11
During a game, Sheldon revisits Christmas memories; finding a date for Koothrappali.
Tuesday, April 21
The Egg Salad Equivalency
Season 6 • Episode 12
Sheldon is accused of sexual harassment and winds up getting Raj, Leonard and Wolowitz in trouble.
Wednesday, April 22
The Bakersfield Expedition
Season 6 • Episode 13
The guys don costumes and go on a road trip to a comic book convention.
Wednesday, April 22
The Stag Convergence
Season 5 • Episode 22
Knowledge of Howard's sexual history makes Bernadette reconsider their future together.
Wednesday, April 22
The Hook-Up Reverberation
Season 8 • Episode 4
Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny.
Wednesday, April 22
The Focus Attenuation
Season 8 • Episode 5
During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.
Wednesday, April 22
The Expedition Approximation
Season 8 • Episode 6
Raj and Sheldon try to simulate a dark-matter research expedition; Penny and Leonard have a fight.
Wednesday, April 22
The Misinterpretation Agitation
Season 8 • Episode 7
The guys try to help when Penny is faced with an awkward dilemma at work.
Wednesday, April 22
The Prom Equivalency
Season 8 • Episode 8
Sheldon feels pressured to participate in traditions when the gang re-creates a high-school prom.
Wednesday, April 22
The Septum Deviation
Season 8 • Episode 9
Leonard has minor surgery on his nose, causing Sheldon to overreact.
Wednesday, April 22
The Bakersfield Expedition
Season 6 • Episode 13
The guys don costumes and go on a road trip to a comic book convention.
Wednesday, April 22
The Killer Robot Instability
Season 2 • Episode 12
The guys lose their most important teammate in an upcoming fighting-robot competition.
Wednesday, April 22
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.
Wednesday, April 22
The Spoiler Alert Segmentation
Season 6 • Episode 15
A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements.
Wednesday, April 22
The Tangible Affection Proof
Season 6 • Episode 16
The guys search for Valentine's Day gifts; Stuart and Raj host a "lonely people" party.
Wednesday, April 22
The Monster Isolation
Season 6 • Episode 17
Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.
Thursday, April 23
The Contractual Obligation Implementation
Season 6 • Episode 18
Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers.
Thursday, April 23
The Launch Acceleration
Season 5 • Episode 23
Wedding plans are jeopardized when NASA reschedules Howard's mission; Leonard surprises Penny.
Thursday, April 23
The Spoiler Alert Segmentation
Season 6 • Episode 15
A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements.
Thursday, April 23
The Tangible Affection Proof
Season 6 • Episode 16
The guys search for Valentine's Day gifts; Stuart and Raj host a "lonely people" party.
Thursday, April 23
The Monster Isolation
Season 6 • Episode 17
Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.
Thursday, April 23
The Contractual Obligation Implementation
Season 6 • Episode 18
Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers.
Thursday, April 23
The Closet Reconfiguration
Season 6 • Episode 19
Howard considers whether he should open a letter from his father.
Thursday, April 23
The Tenure Turbulence
Season 6 • Episode 20
The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.
Thursday, April 23
The Closure Alternative
Season 6 • Episode 21
Amy tries to help Sheldon get over his need for closure; Raj discovers a secret about Lucy.
Thursday, April 23
The Friendship Algorithm
Season 2 • Episode 13
Sheldon develops a scientific procedure for making friends; Kripke controls a new supercomputer.
Thursday, April 23
The Closet Reconfiguration
Season 6 • Episode 19
Howard considers whether he should open a letter from his father.
Thursday, April 23
The Closure Alternative
Season 6 • Episode 21
Amy tries to help Sheldon get over his need for closure; Raj discovers a secret about Lucy.
Thursday, April 23
The Proton Resurgence
Season 6 • Episode 22
Leonard and Sheldon hire the host of their favorite childhood TV show to perform.
Thursday, April 23
The Love Spell Potential
Season 6 • Episode 23
Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons."
Friday, April 24
The Bon Voyage Reaction
Season 6 • Episode 24
When Leonard receives an opportunity to work overseas, Penny and Sheldon are thrown for a loop.
Friday, April 24
The Countdown Reflection
Season 5 • Episode 24
The gang tries to help Wolowitz and Bernadette get married before the space launch.
Friday, April 24
The Champagne Reflection
Season 8 • Episode 10
Howard, Leonard and Raj look through their dead professor's research.
Friday, April 24
The Clean Room Infiltration
Season 8 • Episode 11
Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.
Friday, April 24
The Space Probe Disintegration
Season 8 • Episode 12
The guys agree to do something the girls like; Leonard and Sheldon butt heads.
Friday, April 24
The Anxiety Optimization
Season 8 • Episode 13
Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough.
Friday, April 24
The Troll Manifestation
Season 8 • Episode 14
Sheldon and Leonard must defend themselves from an online bully's criticism after writing a paper.
Friday, April 24
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, April 24
The Intimacy Acceleration
Season 8 • Episode 16
Penny and Sheldon design an experiment -- as a joke -- to make participants fall in love.
Friday, April 24
The Colonization Application
Season 8 • Episode 17
Amy finds out that Sheldon applied for a one-way mission to colonize Mars.
Friday, April 24
The Raiders Minimization
Season 7 • Episode 4
Sheldon wants revenge after Amy ruins one of his favorite films.
Friday, April 24
The Hofstadter Insufficiency
Season 7 • Episode 1
Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.
Friday, April 24
The Deception Verification
Season 7 • Episode 2
Leonard and Sheldon's friendship is tested; Wolowitz's masculinity is threatened.
Friday, April 24
The Scavenger Vortex
Season 7 • Episode 3
Raj designs a scavenger hunt that brings out the best -- and the worst -- in the whole gang.
Friday, April 24
The Raiders Minimization
Season 7 • Episode 4
Sheldon wants revenge after Amy ruins one of his favorite films.
Saturday, April 25
The Workplace Proximity
Season 7 • Episode 5
Sheldon and Amy's relationship is tested when she takes a job at his university.
Saturday, April 25
The Date Night Variable
Season 6 • Episode 1
Raj faces his loneliness; Wolowitz gets drawn into a fight between Bernadette and his mom.
Saturday, April 25
The Change Constant
Season 12 • Episode 23
Sheldon and Amy await big news.
Saturday, April 25
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.
Saturday, April 25
Pilot
Season 1 • Episode 1
Leonard likes new neighbor Penny, but his roommate thinks he is chasing an impossible dream.
Saturday, April 25
The Big Bran Hypothesis
Season 1 • Episode 2
Leonard volunteers to sign for a package, hoping to make a good impression on Penny.
Saturday, April 25
The Fuzzy Boots Corollary
Season 1 • Episode 3
Unhappy that Penny is seeing someone, Leonard summons the courage to ask another woman out.
Saturday, April 25
The Luminous Fish Effect
Season 1 • Episode 4
Getting fired gives Sheldon the opportunity to explore life beyond physics.
Saturday, April 25
The Hamburger Postulate
Season 1 • Episode 5
Leonard, trying to get over Penny, has an unexpected encounter with a fellow scientist.
Saturday, April 25
The Middle Earth Paradigm
Season 1 • Episode 6
Leonard, Sheldon, Wolowitz and Koothrappali attend Penny's Halloween party.
Saturday, April 25
The Dumpling Paradox
Season 1 • Episode 7
Penny sleeps on Leonard and Sheldon's couch when Wolowitz takes over her apartment.
Saturday, April 25
The Grasshopper Experiment
Season 1 • Episode 8
On a blind date, Koothrappali discovers that he can talk to the opposite sex after a few drinks.
Saturday, April 25
The Itchy Brain Simulation
Season 7 • Episode 8
When a mistake comes to light, Sheldon punishes Leonard; Penny decides to confront Raj's ex.
Saturday, April 25
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, April 25
The Romance Resonance
Season 7 • Episode 6
Sheldon's latest scientific breakthrough leaves him feeling like a fraud.
Saturday, April 25
The Proton Displacement
Season 7 • Episode 7
When Professor Proton asks Leonard for help with an experiment, Sheldon befriends Proton's rival.
Saturday, April 25
The Itchy Brain Simulation
Season 7 • Episode 8
When a mistake comes to light, Sheldon punishes Leonard; Penny decides to confront Raj's ex.
Saturday, April 25
The Discovery Dissipation
Season 7 • Episode 10
Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard.
Sunday, April 26
The Hesitation Ramification
Season 7 • Episode 12
Penny asks Leonard a bold question about their relationship; Sheldon wants to learn how to be funny.
Sunday, April 26
The Cooper-Hofstadter Polarization
Season 1 • Episode 9
Penny tries to mediate when Sheldon and Leonard disagree about a physics conference.
Sunday, April 26
The Loobenfeld Decay
Season 1 • Episode 10
Leonard and Sheldon try to avoid seeing Penny perform after hearing her sing.
Sunday, April 26
The Pancake Batter Anomaly
Season 1 • Episode 11
Leonard and the boys avoid Sheldon when he gets sick, leaving Penny to nurse him back to health.
Sunday, April 26
The Jerusalem Duality
Season 1 • Episode 12
Sheldon and Leonard look for a way to derail a 15-year-old physics prodigy's research.
Sunday, April 26
The Bat Jar Conjecture
Season 1 • Episode 13
The guys kick Sheldon off the Physics Bowl team and bring his nemesis aboard.
Sunday, April 26
The Nerdvana Annihilation
Season 1 • Episode 14
Penny tells the guys their obsession with comics and toys is pathetic.
Sunday, April 26
The Pork Chop Indeterminacy
Season 1 • Episode 15
Leonard, Wolowitz and Koothrappali fall for Sheldon's twin sister.
Sunday, April 26
The Peanut Reaction
Season 1 • Episode 16
Penny learns that Leonard does not celebrate birthdays, so she plans a surprise party.
Sunday, April 26
The Tangerine Factor
Season 1 • Episode 17
Leonard finally works up the courage to ask Penny out on a date, and both ask Sheldon for advice.
Sunday, April 26
The Bad Fish Paradigm
Season 2 • Episode 1
Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
Sunday, April 26
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.
Sunday, April 26
The Hesitation Ramification
Season 7 • Episode 12
Penny asks Leonard a bold question about their relationship; Sheldon wants to learn how to be funny.
Sunday, April 26
The Occupation Recalibration
Season 7 • Episode 13
Sheldon must learn how to relax when he is forced to take a vacation.
Sunday, April 26
The Convention Conundrum
Season 7 • Episode 14
Unable to get Comic-Con tickets, Sheldon tries to hold his own convention.
Sunday, April 26
The Locomotive Manipulation
Season 7 • Episode 15
Sheldon and Amy go on a trip to wine country with Howard and Bernadette.
Sunday, April 26
The Table Polarization
Season 7 • Episode 16
When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life.
Sunday, April 26
The Friendship Turbulence
Season 7 • Episode 17
Bernadette tries to negotiate peace between Sheldon and Wolowitz.
Sunday, April 26
The Occupation Recalibration
Season 7 • Episode 13
Sheldon must learn how to relax when he is forced to take a vacation.
Sunday, April 26
The Mommy Observation
Season 7 • Episode 18
Sheldon is faced with a new reality when he visits his mom in Houston.
Sunday, April 26
The Convention Conundrum
Season 7 • Episode 14
Unable to get Comic-Con tickets, Sheldon tries to hold his own convention.
Sunday, April 26
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.
Sunday, April 26
The Locomotive Manipulation
Season 7 • Episode 15
Sheldon and Amy go on a trip to wine country with Howard and Bernadette.
Sunday, April 26
The Relationship Diremption
Season 7 • Episode 20
Sheldon has a personal crisis when he decides string theory is a waste of his time.
Sunday, April 26
The Table Polarization
Season 7 • Episode 16
When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life.
Monday, April 27
The Friendship Turbulence
Season 7 • Episode 17
Bernadette tries to negotiate peace between Sheldon and Wolowitz.
Monday, April 27
The Clean Room Infiltration
Season 8 • Episode 11
Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.
Monday, April 27
The Space Probe Disintegration
Season 8 • Episode 12
The guys agree to do something the girls like; Leonard and Sheldon butt heads.
Monday, April 27
The Prom Equivalency
Season 8 • Episode 8
Sheldon feels pressured to participate in traditions when the gang re-creates a high-school prom.
Monday, April 27
The Septum Deviation
Season 8 • Episode 9
Leonard has minor surgery on his nose, causing Sheldon to overreact.
Monday, April 27
The Champagne Reflection
Season 8 • Episode 10
Howard, Leonard and Raj look through their dead professor's research.
Monday, April 27
The Clean Room Infiltration
Season 8 • Episode 11
Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.
Monday, April 27
The Space Probe Disintegration
Season 8 • Episode 12
The guys agree to do something the girls like; Leonard and Sheldon butt heads.
Monday, April 27
The Anxiety Optimization
Season 8 • Episode 13
Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough.
Monday, April 27
The Troll Manifestation
Season 8 • Episode 14
Sheldon and Leonard must defend themselves from an online bully's criticism after writing a paper.
Monday, April 27
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.
Monday, April 27
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.
Monday, April 27
The Maternal Capacitance
Season 2 • Episode 15
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.
Monday, April 27
The Focus Attenuation
Season 8 • Episode 5
During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.
Monday, April 27
The Expedition Approximation
Season 8 • Episode 6
Raj and Sheldon try to simulate a dark-matter research expedition; Penny and Leonard have a fight.
Monday, April 27
The Prom Equivalency
Season 8 • Episode 8
Sheldon feels pressured to participate in traditions when the gang re-creates a high-school prom.
Monday, April 27
The Septum Deviation
Season 8 • Episode 9
Leonard has minor surgery on his nose, causing Sheldon to overreact.
Monday, April 27
The Relationship Diremption
Season 7 • Episode 20
Sheldon has a personal crisis when he decides string theory is a waste of his time.
Monday, April 27
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.
Tuesday, April 28
The Proton Transmogrification
Season 7 • Episode 22
Professor Proton helps Sheldon deal with grief; Leonard gets into a competition with Penny.
Tuesday, April 28
The Decoupling Fluctuation
Season 6 • Episode 2
Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard.
Tuesday, April 28
The Champagne Reflection
Season 8 • Episode 10
Howard, Leonard and Raj look through their dead professor's research.
Tuesday, April 28
The Clean Room Infiltration
Season 8 • Episode 11
Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.
Tuesday, April 28
The Space Probe Disintegration
Season 8 • Episode 12
The guys agree to do something the girls like; Leonard and Sheldon butt heads.
Tuesday, April 28
The Anxiety Optimization
Season 8 • Episode 13
Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough.
Tuesday, April 28
The Troll Manifestation
Season 8 • Episode 14
Sheldon and Leonard must defend themselves from an online bully's criticism after writing a paper.
Tuesday, April 28
The Cushion Saturation
Season 2 • Episode 16
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
Tuesday, April 28
The Gorilla Dissolution
Season 7 • Episode 23
A bad day compels Penny to re-evaluate her choices -- including Leonard.
Tuesday, April 28
The Status Quo Combustion
Season 7 • Episode 24
Faced with an uncertain future, Sheldon considers a major change.
Tuesday, April 28
The Locomotion Interruption
Season 8 • Episode 1
Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny goes for an interview.
Tuesday, April 28
The Junior Professor Solution
Season 8 • Episode 2
Amy takes advantage of the tension between Penny and Bernadette.
Wednesday, April 29
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.
Wednesday, April 29
The Higgs Boson Observation
Season 6 • Episode 3
Amy feels threatened by Sheldon's new assistant; space starts to wear on Wolowitz.
Wednesday, April 29
The Intimacy Acceleration
Season 8 • Episode 16
Penny and Sheldon design an experiment -- as a joke -- to make participants fall in love.
Wednesday, April 29
The Colonization Application
Season 8 • Episode 17
Amy finds out that Sheldon applied for a one-way mission to colonize Mars.
Wednesday, April 29
The Leftover Thermalization
Season 8 • Episode 18
A magazine article only credits Sheldon in an article about a paper he co-wrote with Leonard.
Wednesday, April 29
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.
Wednesday, April 29
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.
Wednesday, April 29
The Communication Deterioration
Season 8 • Episode 21
The guys fight over a message that could be used for alien contact.
Wednesday, April 29
The Communication Deterioration
Season 8 • Episode 21
The guys fight over a message that could be used for alien contact.
Wednesday, April 29
The Terminator Decoupling
Season 2 • Episode 17
Leonard, Sheldon and Wolowitz are ecstatic to learn that a sci-fi actress is aboard their train.
Wednesday, April 29
The Hook-Up Reverberation
Season 8 • Episode 4
Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny.
Wednesday, April 29
The Focus Attenuation
Season 8 • Episode 5
During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.
Wednesday, April 29
The Expedition Approximation
Season 8 • Episode 6
Raj and Sheldon try to simulate a dark-matter research expedition; Penny and Leonard have a fight.
Wednesday, April 29
The Misinterpretation Agitation
Season 8 • Episode 7
The guys try to help when Penny is faced with an awkward dilemma at work.
Thursday, April 30
The Prom Equivalency
Season 8 • Episode 8
Sheldon feels pressured to participate in traditions when the gang re-creates a high-school prom.
Thursday, April 30
The Re-Entry Minimization
Season 6 • Episode 4
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
Thursday, April 30
The Maternal Combustion
Season 8 • Episode 23
When Sheldon's and Leonard's mothers finally meet, personalities collide.
Thursday, April 30
The Commitment Determination
Season 8 • Episode 24
While facing relationship changes, Sheldon pushes Penny and Leonard to choose a wedding date.
Thursday, April 30
The Matrimonial Momentum
Season 9 • Episode 1
Penny must decide if she can get past Leonard's bad behavior.
Thursday, April 30
The Separation Oscillation
Season 9 • Episode 2
Leonard tries to ease Penny's mind; Sheldon plans a special episode of "Fun With Flags."
Thursday, April 30
The Bachelor Party Corrosion
Season 9 • Episode 3
A flat tire during Leonard's bachelor party weekend in Mexico tests the guys' skills.
Thursday, April 30
The 2003 Approximation
Season 9 • Episode 4
An impending change inspires Sheldon to revert to 2003, before he met Penny and Leonard.
Thursday, April 30
The Perspiration Implementation
Season 9 • Episode 5
Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys.
Thursday, April 30
The Work Song Nanocluster
Season 2 • Episode 18
Penny's home business turns into a complete nightmare when Sheldon takes over.
Thursday, April 30
The Septum Deviation
Season 8 • Episode 9
Leonard has minor surgery on his nose, causing Sheldon to overreact.
Thursday, April 30
The Champagne Reflection
Season 8 • Episode 10
Howard, Leonard and Raj look through their dead professor's research.
Thursday, April 30
The Space Probe Disintegration
Season 8 • Episode 12
The guys agree to do something the girls like; Leonard and Sheldon butt heads.
Thursday, April 30
The Anxiety Optimization
Season 8 • Episode 13
Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough.
Friday, May 1
The Troll Manifestation
Season 8 • Episode 14
Sheldon and Leonard must defend themselves from an online bully's criticism after writing a paper.
Friday, May 1
The Extract Obliteration
Season 6 • Episode 6
A game threatens Sheldon's relationship with Stephen Hawking; Penny signs up for a college class.
Friday, May 1
The Graduation Transmission
Season 8 • Episode 22
Wolowitz questions his engineering skills; a canceled flight puts Leonard's plans in jeopardy.
Friday, May 1
The Maternal Combustion
Season 8 • Episode 23
When Sheldon's and Leonard's mothers finally meet, personalities collide.
Friday, May 1
The Commitment Determination
Season 8 • Episode 24
While facing relationship changes, Sheldon pushes Penny and Leonard to choose a wedding date.
Friday, May 1
The Matrimonial Momentum
Season 9 • Episode 1
Penny must decide if she can get past Leonard's bad behavior.
Friday, May 1
The Separation Oscillation
Season 9 • Episode 2
Leonard tries to ease Penny's mind; Sheldon plans a special episode of "Fun With Flags."
Friday, May 1
The Bachelor Party Corrosion
Season 9 • Episode 3
A flat tire during Leonard's bachelor party weekend in Mexico tests the guys' skills.
Friday, May 1
The 2003 Approximation
Season 9 • Episode 4
An impending change inspires Sheldon to revert to 2003, before he met Penny and Leonard.
Friday, May 1
The Perspiration Implementation
Season 9 • Episode 5
Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys.
Friday, May 1
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.
Friday, May 1
The Dead Hooker Juxtaposition
Season 2 • Episode 19
Penny has a rivalry with a new neighbor who threatens her position as queen bee of the building.
Friday, May 1
The Convergence Convergence
Season 9 • Episode 24
Leonard's recently divorced parents and Sheldon's devoutly religious mother visit.
Friday, May 1
The Conjugal Conjecture
Season 10 • Episode 1
The group deals with the aftermath of Sheldon's mother and Leonard's father's evening together.
Friday, May 1
The Military Miniaturization
Season 10 • Episode 2
Wolowitz has a meeting with Colonel Williams, a representative from the Air Force.
Friday, May 1
The Dependence Transcendence
Season 10 • Episode 3
Sheldon tries an energy drink as the gang races to finish its government project on time.
Friday, May 1
The Cohabitation Experimentation
Season 10 • Episode 4
After her apartment floods, Amy suggests that she and Sheldon move in together.
Friday, May 1
The Intimacy Acceleration
Season 8 • Episode 16
Penny and Sheldon design an experiment -- as a joke -- to make participants fall in love.
Friday, May 1
The Colonization Application
Season 8 • Episode 17
Amy finds out that Sheldon applied for a one-way mission to colonize Mars.
Friday, May 1
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, May 2
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, May 2
The Killer Robot Instability
Season 2 • Episode 12
The guys lose their most important teammate in an upcoming fighting-robot competition.
Saturday, May 2
The Friendship Algorithm
Season 2 • Episode 13
Sheldon develops a scientific procedure for making friends; Kripke controls a new supercomputer.
Saturday, May 2
The Financial Permeability
Season 2 • Episode 14
Sheldon's solution to Penny's financial difficulty leads to a confrontation.
Saturday, May 2
The Maternal Capacitance
Season 2 • Episode 15
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.
Saturday, May 2
The Cushion Saturation
Season 2 • Episode 16
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
Saturday, May 2
The Terminator Decoupling
Season 2 • Episode 17
Leonard, Sheldon and Wolowitz are ecstatic to learn that a sci-fi actress is aboard their train.
Saturday, May 2
The Work Song Nanocluster
Season 2 • Episode 18
Penny's home business turns into a complete nightmare when Sheldon takes over.
Saturday, May 2
The Dead Hooker Juxtaposition
Season 2 • Episode 19
Penny has a rivalry with a new neighbor who threatens her position as queen bee of the building.
Saturday, May 2
The Hofstadter Isotope
Season 2 • Episode 20
Wolowitz and Leonard decide to check out a local bar on Ladies' Night.
Saturday, May 2
The Vegas Renormalization
Season 2 • Episode 21
Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon gets locked out of his apartment.
Saturday, May 2
The Hawking Excitation
Season 5 • Episode 21
When Wolowitz works with Stephen Hawking, Sheldon is determined to meet the famous scientist.
Saturday, May 2
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.
Saturday, May 2
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."
Saturday, May 2
The Veracity Elasticity
Season 10 • Episode 7
Amy lies about repairs being made to her apartment so she can continue living with Sheldon.
Saturday, May 2
The Brain Bowl Incubation
Season 10 • Episode 8
After a successful gene experiment, Sheldon is determined to convince Amy they should procreate.
Saturday, May 2
The Geology Elevation
Season 10 • Episode 9
Sheldon gets jealous when a co-worker wins an award; Wolowitz finds an old invention.
Saturday, May 2
The Property Division Collision
Season 10 • Episode 10
Sheldon and Leonard divvy up their shared belongings.
Saturday, May 2
The Birthday Synchronicity
Season 10 • Episode 11
Bernadette and Howard welcome their baby; Amy celebrates her birthday with Sheldon.
Saturday, May 2
The Holiday Summation
Season 10 • Episode 12
Sheldon and Amy visit Penny and Leonard and tell them about their terrible trip to Texas.
Sunday, May 3
The Commitment Determination
Season 8 • Episode 24
While facing relationship changes, Sheldon pushes Penny and Leonard to choose a wedding date.
Sunday, May 3
The Classified Materials Turbulence
Season 2 • Episode 22
Penny makes a surprising revelation about Leonard while on her date with Stuart.
Sunday, May 3
The Monopolar Expedition
Season 2 • Episode 23
Leonard and Penny re-evaluate their feelings for each other when he prepares for a three-month trip.
Sunday, May 3
The Electric Can Opener Fluctuation
Season 3 • Episode 1
A betrayal threatens the guys' relationship with Sheldon as well as Leonard's chances with Penny.
Sunday, May 3
The Jiminy Conjecture
Season 3 • Episode 2
Penny and Leonard try to recover from an awkward hookup; Howard and Sheldon make a high-stakes bet.
Sunday, May 3
The Gothowitz Deviation
Season 3 • Episode 3
Sheldon tries chocolate-based behavior modification on Penny; Howard and Raj hit a Goth nightclub.
Sunday, May 3
The Pirate Solution
Season 3 • Episode 4
Raj faces deportation if he doesn't find a job; Leonard and Penny deal with Howard as a third wheel.
Sunday, May 3
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.
Sunday, May 3
The Cornhusker Vortex
Season 3 • Episode 6
Sheldon teaches Leonard about football; kite-fighting threatens Howard and Raj's friendship.
Sunday, May 3
The Guitarist Amplification
Season 3 • Episode 7
Sheldon tries to make peace when Leonard and Penny get into an argument.
Sunday, May 3
The Adhesive Duck Deficiency
Season 3 • Episode 8
Penny is forced to rely on Sheldon when she is injured while Howard, Leonard and Raj are away.
Sunday, May 3
The Romance Recalibration
Season 10 • Episode 13
Penny and Amy go on a spa weekend; Wolowitz and Koothrappali try to fix a squeaky floorboard.
Sunday, May 3
The Emotion Detection Automation
Season 10 • Episode 14
Sheldon tests an MIT invention after hearing it can help him read people's emotions.
Sunday, May 3
The Locomotion Reverberation
Season 10 • Episode 15
Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system.
Sunday, May 3
The Allowance Evaporation
Season 10 • Episode 16
Sheldon and Amy have a fight; Koothrappali stops receiving financial support from his father.
Sunday, May 3
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.
Sunday, May 3
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.
Sunday, May 3
The Collaboration Fluctuation
Season 10 • Episode 19
Leonard, Penny and Raj adjust to their new arrangement; Sheldon expresses interest in Amy's work.
Sunday, May 3
The Recollection Dissipation
Season 10 • Episode 20
Sheldon collaborates on too many projects; Bernadette nears the end of her maternity leave.
Monday, May 4
The Perspiration Implementation
Season 9 • Episode 5
Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys.
Monday, May 4
The Anxiety Optimization
Season 8 • Episode 13
Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough.
Monday, May 4
The Troll Manifestation
Season 8 • Episode 14
Sheldon and Leonard must defend themselves from an online bully's criticism after writing a paper.
Monday, May 4
The Separation Agitation
Season 10 • Episode 21
Howard and Bernadette struggle to leave Halley in day care; Bert introduces his new girlfriend.
Monday, May 4
The Cognition Regeneration
Season 10 • Episode 22
Leonard has concerns when Penny considers accepting a job offer from Zack, her ex-boyfriend.
Monday, May 4
The Gyroscopic Collapse
Season 10 • Episode 23
Leonard, Sheldon and Wolowitz get an unwelcome surprise after completing the Air Force project.
Monday, May 4
The Long Distance Dissonance
Season 10 • Episode 24
Sheldon's former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.
Monday, May 4
The Proposal Proposal
Season 11 • Episode 1
Amy answers Sheldon's marriage proposal; Howard and Bernadette struggle with unexpected news.
Monday, May 4
The Retraction Reaction
Season 11 • Episode 2
Leonard's job is at stake after he gives an embarrassing radio interview; Amy and Bernadette bond.
Monday, May 4
The Relaxation Integration
Season 11 • Episode 3
As Sheldon stresses about picking a wedding date, Amy tells him he can be more easygoing.
Monday, May 4
The Vegas Renormalization
Season 2 • Episode 21
Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon gets locked out of his apartment.
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