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Episodes: All (39)  |  With full-length videos ()  |  With videos ()  | See all videos (65) »

Season: 1  |  2
Year: 2007  |  2008  |  unknown


Season 1


Raj and Howard try to help Sheldon pick out an appropriate gift for Penny
See all videos (10) »

Season 1, Episode 1: Pilot

Original Air Date—24 September 2007
A pair of brilliant theoretical physicists meet a woman who shows them how little they know about the real world.

Season 1, Episode 2: The Big Bran Hypothesis

Original Air Date—1 October 2007
Penny is furious and more than a little freaked out with Leonard and Sheldon when they sneak into her apartment overnight, and clean it while she is sleeping.

Penny wakes Sheldon to discuss game strategy
See all videos (4) »

Season 1, Episode 3: The Fuzzy Boots Corollary

Original Air Date—8 October 2007
Leonard gets upset when he discovers that Penny is seeing a new guy, so he tries to trick her into going on a date with him.

The gang asks Raj out to celebrate his People magazine article
See all videos (6) »

Season 1, Episode 4: The Luminous Fish Effect

Original Air Date—15 October 2007
Sheldon's Christian-fundamentalist mother visits to get him out of the funk he's in after he is fired for being disrespectful toward his new boss.

Season 1, Episode 5: The Hamburger Postulate

Original Air Date—22 October 2007
Leonard and his colleague Leslie spend the night together. But Leslie tells Leonard after the fact that she's only interested in a one-night stand.

Season 1, Episode 6: The Middle Earth Paradigm

Original Air Date—29 October 2007
The guys are invited to Penny's Halloween costume party. During the party, Leonard has a run-in with Penny's ex-boyfriend.

America's Next Top Model meets Big Bang Theory, on CBS!
See all videos (2) »

Season 1, Episode 7: The Dumpling Paradox

Original Air Date—5 November 2007
When Howard hooks up with Penny's old friend, it ruins the nights on which all of the guys play the game "Halo."

The guys on the Big Bang Theory have an interesting way of settling their disputes...

Season 1, Episode 8: The Grasshopper Experiment

Original Air Date—12 November 2007
Rajnesh's parents, communicating from India by Web cam, arrange for him to go out with another Indian woman in the hopes of marriage, but his date turns out to have more in common with Sheldon.

Season 1, Episode 9: The Cooper-Hofstadter Polarization

Original Air Date—17 March 2008
Leonard and Sheldon's friendship is put to the test when Leonard wants to present a paper they co-authored at a physics convention, but Sheldon does not.

Leonard tells Howard and Raj about his decision to let Stephanie move in
See all videos (5) »

Season 1, Episode 10: The Loobenfeld Decay

Original Air Date—24 March 2008
Leonard lies to Penny so that he and Sheldon can get out of watching her perform. However, Sheldon believes that the lie has too many loose ends, so he comes up with a new, unnecessarily complex one to replace it.

Season 1, Episode 11: The Pancake Batter Anomaly

Original Air Date—31 March 2008
Sheldon is sick, and Leonard and the guys sneak out to a "Planet of the Apes" movie marathon to get out of taking care of him--which leaves Penny as the only person to whom the needy Sheldon can turn.

The boys quote a classic line from a Star Trek movie in order to convice Sheldon to compete in an academic competition

Season 1, Episode 12: The Jerusalem Duality

Original Air Date—14 April 2008
Sheldon is threatened when a new 15-year-old prodigy who is smarter than him joins the lab, so the guys come up with a plan to get rid of him.

When Leonard buys a time machine online that he can't afford the boys decide to go in on it together

Season 1, Episode 13: The Bat Jar Conjecture

Original Air Date—21 April 2008
Sheldon becomes so intent on demonstrating his intellectual superiority over his Physics Bowl teammates that they boot him, and replace him with his nemesis.

Season 1, Episode 14: The Nerdvana Annihilation

Original Air Date—28 April 2008
Penny gets mad at Leonard because the guys' new "time machine" causes her to miss work. Leonard is so devastated that he vows to give up all of his nerd memorabilia.

Season 1, Episode 15: The Pork Chop Indeterminacy

Original Air Date—5 May 2008
Sheldon's sexy twin sister arrives in town from Texas, and all of Sheldon's friends fight over who will get to be with her.

Season 1, Episode 16: The Peanut Reaction

Original Air Date—12 May 2008
When Penny and the guys learn that Leonard has never had a birthday party, they decide to try and throw a surprise party for them.

Season 1, Episode 17: The Tangerine Factor

Original Air Date—19 May 2008
After Penny breaks up with her new guy, she agrees to go out on a date with Leonard. However, both of them have reservations about the date soon after agreeing to it.

Season 2


A drug induced Sheldon returns to his apartment and finally tells Leonard the secret he's been keeping for Penny
See all videos (3) »

Season 2, Episode 1: The Bad Fish Paradigm

Original Air Date—22 September 2008
Leonard is concerned when his date with Penny ends abruptly and she starts blowing him off. When told the truth, Sheldon would rather move out than keep Penny's reasons a secret from Leonard.

Season 2, Episode 2: The Codpiece Topology

Original Air Date—29 September 2008
After seeing Penny with her new boyfriend, Leonard turns to Leslie for comfort. The move angers Sheldon, who considers Leslie his comic book-style "arch enemy."

Season 2, Episode 3: The Barbarian Sublimation

Original Air Date—6 October 2008
Sheldon turns Penny onto on-line gaming and Penny refuses to turn it off.

Season 2, Episode 4: The Griffin Equivalency

Original Air Date—13 October 2008
After being featured in a People magazine article, Raj becomes full of himself and alienates his friends. However, his newfound fame does get him a date with Penny.

Season 2, Episode 5: The Euclid Alternative

Original Air Date—20 October 2008
The gang tries to teach Sheldon how to drive.

Season 2, Episode 6: The Cooper-Nowitzki Theorem

Original Air Date—3 November 2008
Sheldon becomes cozy with a female graduate student who is infatuated with him, but nobody can figure out whether they're in a relationship--including Sheldon.

Season 2, Episode 7: The Panty Piñata Polarization

Original Air Date—10 November 2008
Penny plans revenge when Sheldon bans her from the guys' apartment, while Howard and Rajesh use the latest technology to try to find the house being used in "America's Next Top Model."

Season 2, Episode 8: The Lizard-Spock Expansion

Original Air Date—17 November 2008
Howard and Leonard's friendship could be at an end when Leonard steals Howard's new woman from him.

Season 2, Episode 9: The White Asparagus Triangulation

Original Air Date—24 November 2008
Sheldon tries to help move Leonard's new relationship along, because his track record with women has been less than successful. But will he cause more trouble than good?

Take a behind the scenes look as Sara Rue guest stars on The Big Bang Theory

Season 2, Episode 10: The Vartabedian Conundrum

Original Air Date—8 December 2008
Leonard is the last one to realize that Stephanie has moved in with him. And when he finds out, he becomes worried that they are moving too fast

Season 2, Episode 11: The Bath Item Gift Hypothesis

Original Air Date—15 December 2008
Much to Lenonard's disappointment, Penny suddenly develops an interest in science when a sexy new physicist joins the lab. Meanwhile, Sheldon struggles to find an appropriate Christmas gift for Penny.

Season 2, Episode 12: The Killer Robot Instability

Original Air Date—????
Howard's depression over his love life threatens the team's chances at a robot fighting competition.
Next US airings:
Mon. Jan. 128:00 PMCBS

Season 2, Episode 13: Episode #2.13

Original Air Date—????

Season 2, Episode 14: Episode #2.14

Original Air Date—????

Season 2, Episode 15: Episode #2.15

Original Air Date—????

Season 2, Episode 16: Episode #2.16

Original Air Date—????

Season 2, Episode 17: Episode #2.17

Original Air Date—????

Season 2, Episode 18: Episode #2.18

Original Air Date—????

Season 2, Episode 19: Episode #2.19

Original Air Date—????

Season 2, Episode 20: Episode #2.20

Original Air Date—????

Season 2, Episode 21: Episode #2.21

Original Air Date—????

Season 2, Episode 22: Episode #2.22

Original Air Date—????

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