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The Big Bang Theory

The Big Bang Theory

Genre: Sitcom

Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics, but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then, that babe-alicious waitress/aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?
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Episode Air Date Channel

The Maternal Capacitance

S02, E15  (First Aired: Feb. 9, 2009)
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother (Christine Baranski).
  • Sun 8/28
  • 6:00PM-6:30PM
  • 29
  • TBS

The Cushion Saturation

S02, E16  (First Aired: Mar. 2, 2009)
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
  • Sun 8/28
  • 6:30PM-7:00PM
  • 29
  • TBS

The Herb Garden Germination

S04, E20  (First Aired: Apr. 7, 2011)
Amy and Sheldon spread gossip as part of an experiment; Howard decides to take a big step in his relationship with Bernadette.
  • Sun 8/28
  • 10:05PM-10:35PM
  • 4
  • KSAS

The Agreement Dissection

S04, E21  (First Aired: Apr. 28, 2011)
Priya dissects the roommate agreement; the ladies take Sheldon dancing.
  • Sun 8/28
  • 10:35PM-11:05PM
  • 4
  • KSAS

The Transporter Malfunction

S05, E20  (First Aired: Mar. 29, 2012)
When Penny buys Leonard and Sheldon ``Star Trek'' collectibles, Sheldon finds himself haunted by Mr. Spock; after a blind date, Raj believes he has met his future wife.
  • Mon 8/29
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Apology Insufficiency

S04, E07  (First Aired: Nov. 4, 2010)
Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.
  • Mon 8/29
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Hawking Excitation

S05, E21  (First Aired: Apr. 5, 2012)
When Wolowitz works with Stephen Hawking, Sheldon is determined to meet the famous scientist.
  • Tue 8/30
  • 6:00PM-6:30PM
  • 4
  • KSAS

The 21-Second Excitation

S04, E08  (First Aired: Nov. 11, 2010)
While the guys camp out for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.
  • Tue 8/30
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Terminator Decoupling

S02, E17  (First Aired: Mar. 9, 2009)
Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is aboard the train they are taking to San Francisco.
  • Tue 8/30
  • 7:00PM-7:30PM
  • 29
  • TBS

The Work Song Nanocluster

S02, E18  (First Aired: Mar. 16, 2009)
Penny's home business turns into a complete nightmare when Sheldon takes over.
  • Tue 8/30
  • 7:30PM-8:00PM
  • 29
  • TBS

The Dead Hooker Juxtaposition

S02, E19  (First Aired: Mar. 30, 2009)
Penny develops a rivalry with a sexy new female neighbor who threatens her position as queen bee of the building.
  • Tue 8/30
  • 8:00PM-8:30PM
  • 29
  • TBS

The Hofstadter Isotope

S02, E20  (First Aired: Apr. 13, 2009)
Wolowitz and Leonard decide to check out a local bar on Ladies' Night.
  • Tue 8/30
  • 8:30PM-9:00PM
  • 29
  • TBS

The Vegas Renormalization

S02, E21  (First Aired: Apr. 27, 2009)
Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon is forced to bunk with Penny when he gets locked out of his apartment.
  • Tue 8/30
  • 9:00PM-9:30PM
  • 29
  • TBS

The Classified Materials Turbulence

S02, E22  (First Aired: May. 4, 2009)
Penny makes a surprising revelation about Leonard while on her date with Stuart; Wolowitz finds a critical design flaw in his NASA project.
  • Tue 8/30
  • 9:30PM-10:00PM
  • 29
  • TBS

The Stag Convergence

S05, E22  (First Aired: Apr. 26, 2012)
Knowledge of Howard's sexual history makes Bernadette reconsider their future together.
  • Wed 8/31
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Boyfriend Complexity

S04, E09  (First Aired: Nov. 18, 2010)
Penny asks Leonard to lie to her father (Keith Carradine); Howard, Raj and Bernadette pull an all-nighter at a telescope.
  • Wed 8/31
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Monopolar Expedition

S02, E23  (First Aired: May. 11, 2009)
While Leonard prepares for a three-month science expedition, he and Penny re-evaluate their feelings for each other.
  • Wed 8/31
  • 7:00PM-7:30PM
  • 29
  • TBS

The Electric Can Opener Fluctuation

S03, E01  (First Aired: Sep. 21, 2009)
After tampering with Sheldon's Arctic-expedition data, the guys follow him back to Texas, which threatens Leonard's chances for romance with Penny.
  • Wed 8/31
  • 7:30PM-8:00PM
  • 29
  • TBS

The Jiminy Conjecture

S03, E02  (First Aired: Sep. 28, 2009)
Penny and Leonard try to recover from an awkward hookup; Howard and Sheldon make a high-stakes bet.
  • Wed 8/31
  • 8:00PM-8:30PM
  • 29
  • TBS

The Gothowitz Deviation

S03, E03  (First Aired: Oct. 5, 2009)
Howard and Raj hit a Goth nightclub to meet women; Sheldon tries chocolate-based behavior modification on Penny.
  • Wed 8/31
  • 8:30PM-9:00PM
  • 29
  • TBS

The Pirate Solution

S03, E04  (First Aired: Oct. 12, 2009)
Raj faces deportation if he does not find a job; Leonard and Penny deal with Howard as a third wheel.
  • Wed 8/31
  • 9:00PM-9:30PM
  • 29
  • TBS

The Creepy Candy Coating Corollary

S03, E05  (First Aired: Oct. 19, 2009)
Sheldon seeks revenge on his nemesis, Wil Wheaton; Wolowitz wants Penny to set him up with one of her friends.
  • Wed 8/31
  • 9:30PM-10:00PM
  • 29
  • TBS

The Launch Acceleration

S05, E23  (First Aired: May. 3, 2012)
Wedding plans are jeopardized when NASA reschedules Howard's mission; Leonard says something in the bedroom that surprises Penny.
  • Thu 9/1
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Alien Parasite Hypothesis

S04, E10  (First Aired: Dec. 9, 2010)
Amy realizes she has feelings for Penny's ex; Koothrappali and Wolowitz try to prove who would be a better superhero.
  • Thu 9/1
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Convergence Convergence

S09, E24  (First Aired: May. 12, 2016)
Leonard's recently divorced parents and Sheldon's devoutly religious mother visit; when they are contacted about their guidance system, Wolowitz and Koothrappali think the government is after them.
  • Thu 9/1
  • 7:00PM-7:31PM
  • 12
  • KWCH

The Cornhusker Vortex

S03, E06  (First Aired: Nov. 2, 2009)
Sheldon teaches Leonard how to understand football; a kite-fighting incident threatens Howard and Raj's friendship.
  • Thu 9/1
  • 8:00PM-8:30PM
  • 29
  • TBS

The Guitarist Amplification

S03, E07  (First Aired: Nov. 9, 2009)
Sheldon tries to make peace when Leonard and Penny get into an argument.
  • Thu 9/1
  • 8:30PM-9:00PM
  • 29
  • TBS

The Countdown Reflection

S05, E24  (First Aired: May. 10, 2012)
The gang tries to help Wolowitz and Bernadette get married before the space launch.
  • Fri 9/2
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Bus Pants Utilization

S04, E12  (First Aired: Jan. 6, 2011)
Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.
  • Fri 9/2
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Infestation Hypothesis

S05, E02  (First Aired: Sep. 22, 2011)
Amy is caught in the middle when Penny and Sheldon get into an argument over a pre-owned chair; Leonard tries to make his long-distance relationship more exciting.
  • Sat 9/3
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Adhesive Duck Deficiency

S03, E08  (First Aired: Nov. 16, 2009)
Penny is forced to rely on Sheldon when she is injured while Howard, Leonard and Raj are away.
  • Sat 9/3
  • 6:00PM-6:30PM
  • 29
  • TBS

The Pulled Groin Extrapolation

S05, E03  (First Aired: Sep. 29, 2011)
Amy and Leonard try to become better acquainted; Bernadette, Howard and Mrs. Wolowitz spend the weekend together.
  • Sat 9/3
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Vengeance Formulation

S03, E09  (First Aired: Nov. 23, 2009)
After being humiliated on the radio, Sheldon vows to destroy Kripke; Wolowitz tries to not ruin his new relationship with Bernadette.
  • Sat 9/3
  • 6:30PM-7:00PM
  • 29
  • TBS

The Gorilla Experiment

S03, E10  (First Aired: Dec. 7, 2009)
Sheldon tries to help Penny understand Leonard's work; Wolowitz gets jealous when Leonard starts hanging out with his new girlfriend.
  • Sat 9/3
  • 7:00PM-7:30PM
  • 29
  • TBS

The Maternal Congruence

S03, E11  (First Aired: Dec. 14, 2009)
Leonard is horrified when his mother (Christine Baranski) visits.
  • Sat 9/3
  • 7:30PM-8:00PM
  • 29
  • TBS

The Psychic Vortex

S03, E12  (First Aired: Jan. 11, 2010)
Sheldon and Koothrappali attend a university mixer; Leonard discovers that Penny believes in psychics.
  • Sat 9/3
  • 8:00PM-8:30PM
  • 29
  • TBS

The Bozeman Reaction

S03, E13  (First Aired: Jan. 18, 2010)
After their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
  • Sat 9/3
  • 8:30PM-9:00PM
  • 29
  • TBS

The Einstein Approximation

S03, E14  (First Aired: Feb. 1, 2010)
Sheldon tries to figure out the answer to a physics problem by working with Penny.
  • Sat 9/3
  • 9:00PM-9:30PM
  • 29
  • TBS

The Large Hadron Collision

S03, E15  (First Aired: Feb. 8, 2010)
Leonard must choose who to bring with him when he goes to see the Large Hadron Collider on Valentine's Day.
  • Sat 9/3
  • 9:30PM-10:00PM
  • 29
  • TBS

The Roommate Transmogrification

S04, E24  (First Aired: May. 19, 2011)
Bernadette gets her Ph.D., inspiring the guys to tease Wolowitz about his lack of a doctorate; Raj becomes Sheldon's roommate.
  • Sun 9/4
  • 10:05PM-10:35PM
  • 4
  • KSAS

The Skank Reflex Analysis

S05, E01  (First Aired: Sep. 22, 2011)
Penny worries that she has ruined her relationship with her friends; Sheldon takes over the paintball team.
  • Sun 9/4
  • 10:35PM-11:05PM
  • 4
  • KSAS

The Date Night Variable

S06, E01  (First Aired: Sep. 27, 2012)
Raj faces his loneliness when his friends are out on dates; while in space, Wolowitz gets drawn into a fight between Bernadette and his mom.
  • Mon 9/5
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Love Car Displacement

S04, E13  (First Aired: Jan. 20, 2011)
Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.
  • Mon 9/5
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Valentino Submergence

S09, E15  (First Aired: Feb. 11, 2016)
Amy and Sheldon host a Valentine's Day edition of Fun With Flags; Penny and Leonard wrestle with getting older; Howard and Bernadette make a discovery in their hot tub; Raj is torn between Emily and another woman.
  • Mon 9/5
  • 7:00PM-7:30PM
  • 12
  • KWCH

The Positive Negative Reaction

S09, E16  (First Aired: Feb. 18, 2016)
The gang celebrates news of Bernadette's pregnancy by singing karaoke; Wolowitz's reaction to the pregnancy announcement worries Bernadette; Wolowitz believes he needs to make more money to support his growing family.
  • Mon 9/5
  • 8:00PM-8:30PM
  • 12
  • KWCH

The Decoupling Fluctuation

S06, E02  (First Aired: Oct. 4, 2012)
Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard; Howard is picked on.
  • Tue 9/6
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Thespian Catalyst

S04, E14  (First Aired: Feb. 3, 2011)
Sheldon takes acting lessons from Penny in hope of becoming a better teacher; Koothrappali fantasizes about his friend's girlfriend.
  • Tue 9/6
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Excelsior Acquisition

S03, E16  (First Aired: Mar. 1, 2010)
Sheldon ends up in traffic court after getting a ticket because of Penny.
  • Tue 9/6
  • 7:00PM-7:30PM
  • 29
  • TBS

The Precious Fragmentation

S03, E17  (First Aired: Mar. 8, 2010)
When the guys buy a ring from ``The Lord of the Rings'' at a garage sale, the item threatens to tear them apart.
  • Tue 9/6
  • 7:30PM-8:00PM
  • 29
  • TBS

The Pants Alternative

S03, E18  (First Aired: Mar. 22, 2010)
Sheldon's stage fright stands between him and a coveted award.
  • Tue 9/6
  • 8:00PM-8:30PM
  • 29
  • TBS

The Wheaton Recurrence

S03, E19  (First Aired: Apr. 12, 2010)
Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off once again.
  • Tue 9/6
  • 8:30PM-9:00PM
  • 29
  • TBS

The Spaghetti Catalyst

S03, E20  (First Aired: May. 3, 2010)
Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.
  • Tue 9/6
  • 9:00PM-9:30PM
  • 29
  • TBS

The Plimpton Stimulation

S03, E21  (First Aired: May. 10, 2010)
Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.
  • Tue 9/6
  • 9:30PM-10:00PM
  • 29
  • TBS

The Higgs Boson Observation

S06, E03  (First Aired: Oct. 11, 2012)
Amy feels threatened by Sheldon's new assistant; Wolowitz starts to feel the pressures of being in space.
  • Wed 9/7
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Benefactor Factor

S04, E15  (First Aired: Feb. 10, 2011)
A wealthy donor makes Leonard question what he is willing to do for science.
  • Wed 9/7
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Staircase Implementation

S03, E22  (First Aired: May. 17, 2010)
Leonard tells Penny about how he met Sheldon and what happened to the elevator.
  • Wed 9/7
  • 7:00PM-7:30PM
  • 29
  • TBS

The Lunar Excitation

S03, E23  (First Aired: May. 24, 2010)
Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.
  • Wed 9/7
  • 7:30PM-8:00PM
  • 29
  • TBS

The Robotic Manipulation

S04, E01  (First Aired: Sep. 23, 2010)
Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.
  • Wed 9/7
  • 8:00PM-8:30PM
  • 29
  • TBS

The Cruciferous Vegetable Amplification

S04, E02  (First Aired: Sep. 30, 2010)
Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.
  • Wed 9/7
  • 8:30PM-9:00PM
  • 29
  • TBS

The Zazzy Substitution

S04, E03  (First Aired: Oct. 7, 2010)
When Sheldon searches for an alternative to human companionship, the guys become concerned.
  • Wed 9/7
  • 9:00PM-9:30PM
  • 29
  • TBS

The Hot Troll Deviation

S04, E04  (First Aired: Oct. 14, 2010)
An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.
  • Wed 9/7
  • 9:30PM-10:00PM
  • 29
  • TBS

The Re-Entry Minimization

S06, E04  (First Aired: Oct. 18, 2012)
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
  • Thu 9/8
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Cohabitation Formulation

S04, E16  (First Aired: Feb. 17, 2011)
Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.
  • Thu 9/8
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Application Deterioration

S09, E18  (First Aired: Mar. 10, 2016)
Leonard, Sheldon and Wolowitz file for a patent on their new invention; Penny, Amy and Bernadette give dating advice to Koothrappali after his breakup with Emily.
  • Thu 9/8
  • 7:00PM-7:31PM
  • 12
  • KWCH

The Desperation Emanation

S04, E05  (First Aired: Oct. 21, 2010)
Leonard realizes he is the only one in his group without a girlfriend; Sheldon wants to get rid of his girlfriend.
  • Thu 9/8
  • 8:00PM-8:30PM
  • 29
  • TBS

The Irish Pub Formulation

S04, E06  (First Aired: Oct. 28, 2010)
Leonard keeps an affair a secret from Sheldon, Howard and Raj.
  • Thu 9/8
  • 8:30PM-9:00PM
  • 29
  • TBS

The Extract Obliteration

S06, E06  (First Aired: Nov. 1, 2012)
A game threatens Sheldon's relationship with Stephen Hawking; Penny secretly signs up for a college class.
  • Fri 9/9
  • 6:00PM-6:30PM
  • 4
  • KSAS

The Toast Derivation

S04, E17  (First Aired: Feb. 24, 2011)
Sheldon is upset when he realizes Leonard is the center of their group of friends.
  • Fri 9/9
  • 6:30PM-7:00PM
  • 4
  • KSAS

The Apology Insufficiency

S04, E07  (First Aired: Nov. 4, 2010)
Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.
  • Fri 9/9
  • 8:00PM-8:30PM
  • 29
  • TBS

The 21-Second Excitation

S04, E08  (First Aired: Nov. 11, 2010)
While the guys camp out for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.
  • Fri 9/9
  • 8:30PM-9:00PM
  • 29
  • TBS

The Boyfriend Complexity

S04, E09  (First Aired: Nov. 18, 2010)
Penny asks Leonard to lie to her father (Keith Carradine); Howard, Raj and Bernadette pull an all-nighter at a telescope.
  • Sat 9/10
  • 6:00PM-6:30PM
  • 29
  • TBS

The Alien Parasite Hypothesis

S04, E10  (First Aired: Dec. 9, 2010)
Amy realizes she has feelings for Penny's ex; Koothrappali and Wolowitz try to prove who would be a better superhero.
  • Sat 9/10
  • 6:30PM-7:00PM
  • 29
  • TBS

The Justice League Recombination

S04, E11  (First Aired: Dec. 16, 2010)
The guys try to bond with Penny's new boyfriend through a costume contest.
  • Sat 9/10
  • 7:00PM-7:30PM
  • 29
  • TBS

The Bus Pants Utilization

S04, E12  (First Aired: Jan. 6, 2011)
Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.
  • Sat 9/10
  • 7:30PM-8:00PM
  • 29
  • TBS

The Love Car Displacement

S04, E13  (First Aired: Jan. 20, 2011)
Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.
  • Sat 9/10
  • 8:00PM-8:30PM
  • 29
  • TBS

The Thespian Catalyst

S04, E14  (First Aired: Feb. 3, 2011)
Sheldon takes acting lessons from Penny in hope of becoming a better teacher; Koothrappali fantasizes about his friend's girlfriend.
  • Sat 9/10
  • 8:30PM-9:00PM
  • 29
  • TBS

The Benefactor Factor

S04, E15  (First Aired: Feb. 10, 2011)
A wealthy donor makes Leonard question what he is willing to do for science.
  • Sat 9/10
  • 9:00PM-9:30PM
  • 29
  • TBS

The Cohabitation Formulation

S04, E16  (First Aired: Feb. 17, 2011)
Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.
  • Sat 9/10
  • 9:30PM-10:00PM
  • 29
  • TBS