Season:
1
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2
|
3
Year:
2007
|
2008
|
2009
Season 1, Episode 1: Pilot
24 September 2007A pair of brilliant theoretical physicists meet a woman who shows them how little they know about the real world.
1 October 2007Penny 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.
8 October 2007Leonard 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.
15 October 2007Sheldon'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.
22 October 2007Leonard 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.
29 October 2007The guys are invited to Penny's Halloween costume party. During the party, Leonard has a run-in with Penny's ex-boyfriend.
5 November 2007When Howard hooks up with Penny's old friend, it ruins the nights on which all of the guys play the game "Halo."
12 November 2007Rajnesh'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.
17 March 2008Leonard 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.
24 March 2008Leonard 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.
31 March 2008Sheldon 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.
14 April 2008Sheldon 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.
21 April 2008Sheldon becomes so intent on demonstrating his intellectual superiority over his Physics Bowl teammates that they boot him, and replace him with his nemesis.
28 April 2008Penny 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.
5 May 2008Sheldon's sexy twin sister arrives in town from Texas, and all of Sheldon's friends fight over who will get to be with her.
12 May 2008When Penny and the guys learn that Leonard has never had a birthday party, they decide to try to throw a surprise party for him.
19 May 2008After 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.
22 September 2008Leonard 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.
29 September 2008After 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."
6 October 2008Sheldon turns Penny on to online gaming, and then she refuses to turn it off after becoming addicted.
13 October 2008After 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.
20 October 2008The gang tries to teach Sheldon how to drive.
3 November 2008Sheldon 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.
10 November 2008Penny 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."
17 November 2008Howard and Leonard's friendship could be at an end when Leonard steals Howard's new woman from him.
24 November 2008Sheldon 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?
8 December 2008Leonard 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
15 December 2008Much 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.
12 January 2009Howard becomes depressed after Penny makes a cruel statement about his love life, while the rest of the guys prepare for a grudge killer robot duel against an obnoxious colleague at the university.
19 January 2009Sheldon tries to make friends with a despised colleague, with the hopes that it will get him access to a coveted computer in the lab.
2 February 2009Penny cannot afford to pay her rent, so Sheldon and Leonard each come up with unique ways to help her out.
9 February 2009Sheldon hits it off with Leonard's psychoanalyst mother, but she drives Leonard and Penny to the bottle.
5 May 2009Howard hooks up with Leslie, while Penny accidentally ruins Sheldon's spot on the couch.
9 March 2009On a train trip to San Francisco, the boys debate on how to meet sci-fi star Summer Glau, who is on board with them.
16 March 2009Sheldon's assistance with Penny's home-based business leads to disaster.
30 March 2009Penny becomes jealous when a gorgeous new neighbor attracts the guys' attention.
13 April 2009Leonard is so upset when a friend from the comic book store begins dating Penny that he convinces Howard and Raj to take him to a bar so that he can pick up a woman of his own.
27 April 2009After being dumped by Leslie, Howard heads to Las Vegas with Leonard and Raj, leaving Penny to deal with Sheldon, who has locked himself out of the apartment.
4 May 2009Penny's second date with Stuart has significant implications for Leonard. Howard enlists the guys' help with one of his NASA projects.
11 May 2009Penny gets upset when she finds out Leonard and the guys plan to work at the North Pole for the summer.
21 September 2009After returning from the North Pole, a conflict among the guys sends Sheldon back to Texas and interferes with Leonard's reunion with Penny.
28 September 2009Leonard and Penny's first night together goes awkwardly. Sheldon and Howard wager on the species of a cricket.
5 October 2009Sheldon attempts to covertly alter Penny's habits, while Howard and Raj try their luck meeting women at a Goth-style club.
12 October 2009Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as third wheel.
19 October 2009Wolowitz begs Penny to set him up with one of her friends; Sheldon seeks payback against Wil Wheaton at a trading-card show.
2 November 2009To blend in better with several of Penny's friends from back home, Leonard learns about football...from Sheldon. Meanwhile, a loss in a kite war threatens to end Raj and Howard's friendship.
9 November 2009Sheldon is forced to play peacemaker when Leonard and Penny have an argument, mainly because their fighting is bringing back repressed childhood memories.
16 November 2009With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
23 November 2009Sheldon vows payback after Kripke humiliates him on the radio. Howard gets advice concerning his relationship with Bernadette...from "Battlestar Galactica's" Katee Sackhoff.
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