The Big Bang Theory
Cast & Crew
Upcoming TV Airings
The airings below are based on a generic national schedule. Times and dates can vary by TV provider.
Sunday, April 21
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.
Sunday, April 21
The Bozeman Reaction
Season 3 • Episode 13
Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
Sunday, April 21
The Einstein Approximation
Season 3 • Episode 14
Sheldon tries to figure out the answer to a physics problem by working with Penny.
Sunday, April 21
The Large Hadron Collision
Season 3 • Episode 15
Leonard must choose who to bring with him when he goes to see the Large Hadron Collider.
Sunday, April 21
The Excelsior Acquisition
Season 3 • Episode 16
Sheldon ends up in traffic court after getting a ticket because of Penny.
Sunday, April 21
The Precious Fragmentation
Season 3 • Episode 17
A ring from "The Lord of the Rings" at a garage sale threatens to tear the guys apart.
Sunday, April 21
The Pants Alternative
Season 3 • Episode 18
Sheldon's stage fright stands between him and a coveted award.
Sunday, April 21
The Wheaton Recurrence
Season 3 • Episode 19
Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off.
Monday, April 22
The Roommate Transmogrification
Season 4 • Episode 24
Bernadette gets her Ph.D., inspiring the guys to tease Wolowitz about his lack of a doctorate.
Monday, April 22
The Spaghetti Catalyst
Season 3 • Episode 20
Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.
Monday, April 22
The Plimpton Stimulation
Season 3 • Episode 21
Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.
Monday, April 22
The Staircase Implementation
Season 3 • Episode 22
Leonard tells Penny about how he met Sheldon and what happened to the elevator.
Monday, April 22
The Lunar Excitation
Season 3 • Episode 23
Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.
Monday, April 22
The Robotic Manipulation
Season 4 • Episode 1
Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.
Monday, April 22
The Cruciferous Vegetable Amplification
Season 4 • Episode 2
Sheldon realizes he will not live long enough to download his consciousness into a robot body.
Monday, April 22
The Zazzy Substitution
Season 4 • Episode 3
When Sheldon searches for an alternative to human companionship, the guys become concerned.
Monday, 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.
Monday, April 22
The Desperation Emanation
Season 4 • Episode 5
Leonard realizes he is the only one in his group without a girlfriend.
Monday, April 22
The Irish Pub Formulation
Season 4 • Episode 6
Leonard keeps an affair a secret from Sheldon, Howard and Raj.
Monday, April 22
The Apology Insufficiency
Season 4 • Episode 7
Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.
Monday, April 22
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.
Tuesday, April 23
The Bozeman Reaction
Season 3 • Episode 13
Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
Tuesday, April 23
The Boyfriend Complexity
Season 4 • Episode 9
Penny asks Leonard to lie to her father; an all-nighter at a telescope.
Tuesday, April 23
The Alien Parasite Hypothesis
Season 4 • Episode 10
Koothrappali and Wolowitz try to prove who would be a better superhero.
Tuesday, April 23
The Justice League Recombination
Season 4 • Episode 11
The guys try to bond with Penny's new boyfriend through a costume contest.
Tuesday, April 23
The Bus Pants Utilization
Season 4 • Episode 12
Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.
Tuesday, April 23
The Love Car Displacement
Season 4 • Episode 13
Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.
Tuesday, April 23
The Thespian Catalyst
Season 4 • Episode 14
Sheldon takes acting lessons from Penny in hope of becoming a better teacher.
Tuesday, April 23
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 24
The Benefactor Factor
Season 4 • Episode 15
A wealthy donor makes Leonard question what he is willing to do for science.
Wednesday, April 24
The Cohabitation Formulation
Season 4 • Episode 16
Wolowitz considers taking things with Bernadette to the next level.
Wednesday, April 24
The Toast Derivation
Season 4 • Episode 17
Sheldon is upset when he realizes Leonard is the center of their group of friends.
Wednesday, April 24
The Prestidigitation Approximation
Season 4 • Episode 18
Leonard must choose between Penny and his new girlfriend, Priya.
Wednesday, April 24
The Zarnecki Incursion
Season 4 • Episode 19
The guys try to figure out who hacked Sheldon's online-game account.
Wednesday, April 24
The Herb Garden Germination
Season 4 • Episode 20
Howard decides to take a big step in his relationship with Bernadette.
Wednesday, April 24
The Agreement Dissection
Season 4 • Episode 21
Priya dissects the roommate agreement; the ladies take Sheldon dancing.
Wednesday, April 24
The Misinterpretation Agitation
Season 8 • Episode 7
The guys try to help when Penny is faced with an awkward dilemma at work.
Thursday, April 25
The Large Hadron Collision
Season 3 • Episode 15
Leonard must choose who to bring with him when he goes to see the Large Hadron Collider.
Thursday, April 25
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, April 25
The Skank Reflex Analysis
Season 5 • Episode 1
Penny worries that she has ruined her relationship with her friends.
Thursday, April 25
The Infestation Hypothesis
Season 5 • Episode 2
Amy is caught in the middle when Penny and Sheldon argue over a pre-owned chair.
Thursday, April 25
The Pulled Groin Extrapolation
Season 5 • Episode 3
Bernadette, Howard and Mrs. Wolowitz spend the weekend together.
Thursday, April 25
The Wiggly Finger Catalyst
Season 5 • Episode 4
Raj wants a girlfriend, so Penny introduces him to a woman he can communicate with.
Thursday, April 25
The Prom Equivalency
Season 8 • Episode 8
Sheldon feels pressured to participate in traditions when the gang re-creates a high-school prom.
Friday, April 26
The Excelsior Acquisition
Season 3 • Episode 16
Sheldon ends up in traffic court after getting a ticket because of Penny.
Friday, April 26
The Rhinitis Revelation
Season 5 • Episode 6
Sheldon finds himself competing with the gang for his mother's attention when she visits.
Friday, April 26
The Good Guy Fluctuation
Season 5 • Episode 7
An attractive comic book artist tests Leonard and Priya's relationship.
Friday, April 26
The Isolation Permutation
Season 5 • Episode 8
Amy is devastated when Penny and Bernadette shop for wedding dresses without her.
Friday, April 26
The Ornithophobia Diffusion
Season 5 • Episode 9
Leonard and Penny spend time alone; Sheldon tries to face his fear of birds.
Friday, April 26
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 26
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 26
The Shiny Trinket Maneuver
Season 5 • Episode 12
Amy is upset with Sheldon when he isn't impressed with her recent accomplishment.
Friday, April 26
The Septum Deviation
Season 8 • Episode 9
Leonard has minor surgery on his nose, causing Sheldon to overreact.
Saturday, April 27
The Precious Fragmentation
Season 3 • Episode 17
A ring from "The Lord of the Rings" at a garage sale threatens to tear the guys apart.
Sunday, April 28
The Skank Reflex Analysis
Season 5 • Episode 1
Penny worries that she has ruined her relationship with her friends.
Sunday, April 28
The Rothman Disintegration
Season 5 • Episode 17
Sheldon and Kripke compete for a corner office; Penny receives a gift from Amy.
Sunday, April 28
The Werewolf Transformation
Season 5 • Episode 18
Sheldon's routine is turned upside down when his barber gets sick.
Sunday, April 28
The Weekend Vortex
Season 5 • Episode 19
Sheldon decides to play video games with the guys instead of attending a party with Amy.
Sunday, April 28
The Transporter Malfunction
Season 5 • Episode 20
After receiving new "Star Trek" collectibles, Sheldon finds himself haunted by Mr. Spock.
Sunday, April 28
The Hawking Excitation
Season 5 • Episode 21
When Wolowitz works with Stephen Hawking, Sheldon is determined to meet the famous scientist.
Sunday, April 28
The Stag Convergence
Season 5 • Episode 22
Knowledge of Howard's sexual history makes Bernadette reconsider their future together.
Monday, April 29
The Infestation Hypothesis
Season 5 • Episode 2
Amy is caught in the middle when Penny and Sheldon argue over a pre-owned chair.
Monday, April 29
The Launch Acceleration
Season 5 • Episode 23
Wedding plans are jeopardized when NASA reschedules Howard's mission; Leonard surprises Penny.
Monday, April 29
The Countdown Reflection
Season 5 • Episode 24
The gang tries to help Wolowitz and Bernadette get married before the space launch.
Monday, April 29
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 29
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 29
The Higgs Boson Observation
Season 6 • Episode 3
Amy feels threatened by Sheldon's new assistant; space starts to wear on Wolowitz.
Monday, April 29
The Re-Entry Minimization
Season 6 • Episode 4
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
Monday, April 29
The Holographic Excitation
Season 6 • Episode 5
The gang heads to Stuart's comic book store to celebrate Halloween.
Monday, April 29
The Champagne Reflection
Season 8 • Episode 10
Howard, Leonard and Raj look through their dead professor's research.
Monday, April 29
The Habitation Configuration
Season 6 • Episode 7
Sheldon is caught in the middle of Amy and Wil Wheaton's argument.
Monday, April 29
The 43 Peculiarity
Season 6 • Episode 8
Raj and Howard try to figure out why Sheldon disappears at 2:45 every afternoon.
Monday, April 29
The Parking Spot Escalation
Season 6 • Episode 9
Sheldon and Wolowitz's fight over a parking spot at the university impacts the whole gang.
Monday, April 29
The Fish Guts Displacement
Season 6 • Episode 10
When Amy gets sick, Sheldon tries to nurse her back to health.
Tuesday, April 30
The Pants Alternative
Season 3 • Episode 18
Sheldon's stage fright stands between him and a coveted award.
Tuesday, April 30
The Santa Simulation
Season 6 • Episode 11
During a game, Sheldon revisits Christmas memories; finding a date for Koothrappali.
Tuesday, April 30
The Egg Salad Equivalency
Season 6 • Episode 12
Sheldon is accused of sexual harassment and winds up getting Raj, Leonard and Wolowitz in trouble.
Tuesday, April 30
The Bakersfield Expedition
Season 6 • Episode 13
The guys don costumes and go on a road trip to a comic book convention.
Tuesday, April 30
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.
Tuesday, April 30
The Spoiler Alert Segmentation
Season 6 • Episode 15
A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements.
Tuesday, April 30
The Space Probe Disintegration
Season 8 • Episode 12
The guys agree to do something the girls like; Leonard and Sheldon butt heads.
Wednesday, May 1
The Wheaton Recurrence
Season 3 • Episode 19
Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off.
Wednesday, May 1
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, May 1
The Monster Isolation
Season 6 • Episode 17
Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.
Wednesday, May 1
The Contractual Obligation Implementation
Season 6 • Episode 18
Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers.
Wednesday, May 1
The Closet Reconfiguration
Season 6 • Episode 19
Howard considers whether or not he should open a letter from his father.
Wednesday, May 1
The Tenure Turbulence
Season 6 • Episode 20
The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.
Wednesday, May 1
The Closure Alternative
Season 6 • Episode 21
Amy tries to help Sheldon get over his need for closure; Raj discovers a secret about Lucy.
Wednesday, May 1
The Proton Resurgence
Season 6 • Episode 22
Leonard and Sheldon hire the host of their favorite childhood TV show to perform.
Wednesday, May 1
The Anxiety Optimization
Season 8 • Episode 13
Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough.
Thursday, May 2
The Spaghetti Catalyst
Season 3 • Episode 20
Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.
Thursday, May 2
The Bon Voyage Reaction
Season 6 • Episode 24
When Leonard receives an opportunity to work overseas, Penny and Sheldon are thrown for a loop.
Thursday, May 2
The Hofstadter Insufficiency
Season 7 • Episode 1
Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.
Thursday, May 2
The Deception Verification
Season 7 • Episode 2
Leonard and Sheldon's friendship is tested; Wolowitz's masculinity is threatened.
Thursday, May 2
The Scavenger Vortex
Season 7 • Episode 3
Raj designs a scavenger hunt that brings out the best -- and the worst -- in the whole gang.
Thursday, May 2
The Raiders Minimization
Season 7 • Episode 4
Sheldon wants revenge after Amy ruins one of his favorite films.
Thursday, May 2
The Workplace Proximity
Season 7 • Episode 5
Sheldon and Amy's relationship is tested when she takes a job at his university.
Thursday, May 2
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 3
The Plimpton Stimulation
Season 3 • Episode 21
Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.
Friday, May 3
The Romance Resonance
Season 7 • Episode 6
Sheldon's latest scientific breakthrough leaves him feeling like a fraud.
Friday, May 3
The Proton Displacement
Season 7 • Episode 7
When Professor Proton asks Leonard for help with an experiment, Sheldon befriends Proton's rival.
Friday, May 3
The Itchy Brain Simulation
Season 7 • Episode 8
When a mistake comes to light, Sheldon punishes Leonard; Penny decides to confront Raj's ex.
Friday, May 3
The Thanksgiving Decoupling
Season 7 • Episode 9
When the gang decides to spend Thanksgiving at Mrs. Wolowitz's house, Sheldon protests.
Friday, May 3
The Discovery Dissipation
Season 7 • Episode 10
Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard.
Friday, May 3
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.
Friday, May 3
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, May 3
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, May 4
The Staircase Implementation
Season 3 • Episode 22
Leonard tells Penny about how he met Sheldon and what happened to the elevator.
Saturday, May 4
The Focus Attenuation
Season 8 • Episode 5
During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.
Sunday, May 5
The Pulled Groin Extrapolation
Season 5 • Episode 3
Bernadette, Howard and Mrs. Wolowitz spend the weekend together.
Sunday, May 5
The Vegas Renormalization
Season 2 • Episode 21
Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon gets locked out of his apartment.
Sunday, May 5
The Weekend Vortex
Season 5 • Episode 19
Sheldon decides to play video games with the guys instead of attending a party with Amy.
Sunday, May 5
The Holographic Excitation
Season 6 • Episode 5
The gang heads to Stuart's comic book store to celebrate Halloween.
Sunday, May 5
The Convention Conundrum
Season 7 • Episode 14
Unable to get Comic-Con tickets, Sheldon tries to hold his own convention.
Sunday, May 5
The Proton Transmogrification
Season 7 • Episode 22
Professor Proton helps Sheldon deal with grief; Leonard gets into a competition with Penny.
Sunday, May 5
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.
Monday, May 6
The Wiggly Finger Catalyst
Season 5 • Episode 4
Raj wants a girlfriend, so Penny introduces him to a woman he can communicate with.
Monday, May 6
The Occupation Recalibration
Season 7 • Episode 13
Sheldon must learn how to relax when he is forced to take a vacation.
Monday, May 6
The Convention Conundrum
Season 7 • Episode 14
Unable to get Comic-Con tickets, Sheldon tries to hold his own convention.
Monday, May 6
The Locomotive Manipulation
Season 7 • Episode 15
Sheldon and Amy go on a trip to wine country with Howard and Bernadette.
Monday, May 6
The Table Polarization
Season 7 • Episode 16
When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life.
Monday, May 6
The Friendship Turbulence
Season 7 • Episode 17
Bernadette tries to negotiate peace between Sheldon and Wolowitz.
Monday, May 6
The Mommy Observation
Season 7 • Episode 18
Sheldon is faced with a new reality when he visits his mom in Houston.
Monday, May 6
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.
Monday, May 6
The Intimacy Acceleration
Season 8 • Episode 16
Penny and Sheldon design an experiment -- as a joke -- to make participants fall in love.
Monday, May 6
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, May 6
The Proton Transmogrification
Season 7 • Episode 22
Professor Proton helps Sheldon deal with grief; Leonard gets into a competition with Penny.
Monday, May 6
The Gorilla Dissolution
Season 7 • Episode 23
A bad day compels Penny to re-evaluate her choices -- including Leonard.
Monday, May 6
The Status Quo Combustion
Season 7 • Episode 24
Faced with an uncertain future, Sheldon considers a major change.
Monday, May 6
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, May 7
The Lunar Excitation
Season 3 • Episode 23
Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.
Tuesday, May 7
The Junior Professor Solution
Season 8 • Episode 2
Amy takes advantage of the tension between Penny and Bernadette.
Tuesday, May 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.
Tuesday, May 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.
Tuesday, May 7
The Focus Attenuation
Season 8 • Episode 5
During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.
Tuesday, May 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.