Episodes cast for
"The Big Bang Theory" (2007) More at IMDbPro »

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

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Season 1

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Season 1, Episode 1: Pilot

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

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Vernee Watson-Johnson	...	Althea (as Vernée Watson)
	Brian Wade	...	Kurt (as Brian Patrick Wade)
	Iris Bahr	...	Gilda (uncredited)
	Amanda Walsh	...	Katie (uncredited)

Season 1, Episode 2: The Big Bran Hypothesis

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Allen Nabors	...	Doug (uncredited)

Season 1, Episode 3: The Fuzzy Boots Corollary

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle
	Allen Nabors	...	Doug
	Treisa Gary	...	Waitress
	Sherry Weston	...	Instructor

Season 1, Episode 4: The Luminous Fish Effect

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Laurie Metcalf	...	Mary
	Mark Harelik	...	Dr. Eric Gablehauser
	Sierra Edwards	...	Summer

Season 1, Episode 5: The Hamburger Postulate

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle

Season 1, Episode 6: The Middle Earth Paradigm

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Brian Wade	...	Kurt (as Brian Patrick Wade)
	Rachel Cannon	...	Patty
	Erin Allin O'Reilly	...	Cheryl
	Kimberly Kevon Williams	...	Vicki
	Cynthia Holloway	...	Roberta

Season 1, Episode 7: The Dumpling Paradox

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."

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Brooke D'Orsay	...	Christy
	James Hong	...	Chen
	Carol Ann Susi	...	Mrs. Wolowitz (voice)
	Kimberly Brooks	...	Automated Cell Phone Voice (voice) (as Kimberly D. Brooks)

Season 1, Episode 8: The Grasshopper Experiment

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sarayu Rao	...	Lalita Gupta
	Brian George	...	Dr. V.M. Koothrappali
	Alice Amter	...	Mrs. Koothrappali

Season 1, Episode 9: The Cooper-Hofstadter Polarization

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Talbott Lin	...	Chinese Leonard
	Howard Chan	...	Chinese Sheldon

Season 1, Episode 10: The Loobenfeld Decay

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	DJ Qualls	...	Toby Loobenfeld (as D.J. Qualls)

Season 1, Episode 11: The Pancake Batter Anomaly

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Carol Ann Susi	...	Mrs. Wolowitz (voice)
	Erin Allin O'Reilly	...	Cheryl

Season 1, Episode 12: The Jerusalem Duality

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Mark Harelik	...	Dr. Eric Gablehauser
	Austin Lee	...	Dennis Kim
	Emma Degerstedt	...	Emma
	Joel Brooks	...	Professor Goldfarb (uncredited)

Season 1, Episode 13: The Bat Jar Conjecture

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle
	Mark Harelik	...	Dr. Eric Gablehauser
	Adam Gregor	...	Dmitri
	Sandra Marquez	...	Woman
	Sergio Enrique	...	Son

Season 1, Episode 14: The Nerdvana Annihilation

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Andrew W. Walker	...	Mike (as Andrew Walker)

Season 1, Episode 15: The Pork Chop Indeterminacy

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Courtney Henggeler	...	Missy

Season 1, Episode 16: The Peanut Reaction

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Vernee Watson-Johnson	...	Althea (as Vernée Watson)
	Judith Moreland	...	Jan
	Ronald Hunter	...	Dan
	Chuck Carter	...	Stan

Season 1, Episode 17: The Tangerine Factor

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	James Hong	...	Chen
	William Ngo	...	Chinese International Grad Student (uncredited)

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Season 2

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Season 2, Episode 1: The Bad Fish Paradigm

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle
	Carol Ann Susi	...	Mrs. Wolowitz

Season 2, Episode 2: The Codpiece Topology

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."

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle
	Travis Schuldt	...	Eric

Season 2, Episode 3: The Barbarian Sublimation

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

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle
	Mark Hames	...	Tom
	Tyler J. Olson	...	Blaine

Season 2, Episode 4: The Griffin Equivalency

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle
	Mark Harelik	...	Dr. Eric Gablehauser
	Brian George	...	Dr. V.M. Koothrappali
	Alice Amter	...	Mrs. Koothrappali
	Charlie Sheen	...	(uncredited)

Season 2, Episode 5: The Euclid Alternative

20 October 2008
The gang tries to teach Sheldon how to drive.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Octavia Spencer	...	Octavia
	Elena Campbell-Martinez	...	Maria
	Livia Treviño	...	Lourdes
	Jaime Soria	...	DMV Customer (uncredited)

Season 2, Episode 6: The Cooper-Nowitzki Theorem

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle
	Emily Happe	...	Kathy O'Brian
	Riki Lindhome	...	Ramona Nowitzki

Season 2, Episode 7: The Panty Piñata Polarization

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."

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle (credit only)
	Samantha Potter	...	Samantha
	Analeigh Tipton	...	Analeigh

Season 2, Episode 8: The Lizard-Spock Expansion

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

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Robert Clotworthy	...	Announcer (voice)
	Sara Gilbert	...	Leslie Winkle
	Jennifer Hale	...	News Announcer (voice)
	Sara Rue	...	Stephanie
	Carol Ann Susi	...	Mrs. Wolowitz (voice)

Season 2, Episode 9: The White Asparagus Triangulation

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?

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Sara Gilbert	...	Leslie Winkle
	Sara Rue	...	Stephanie

Season 2, Episode 10: The Vartabedian Conundrum

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

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajnesh Koothrappali
	Sara Rue	...	Stephanie Barnett

Season 2, Episode 11: The Bath Item Gift Hypothesis

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.

	Johnny Galecki	...	Leonard Hofstadter
	Jim Parsons	...	Sheldon Cooper
	Kaley Cuoco	...	Penny
	Simon Helberg	...	Howard Wolowitz
	Kunal Nayyar	...	Rajesh Koothrappali
	Michael Hyatt	...	Charlotte
	Michael Trucco	...	David Underhill

Season 2, Episode 12: The Killer Robot Instability

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Howard's depression over his love life threatens the team's chances at a robot fighting competition.

Season 2, Episode 13: Episode #2.13

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Season 2, Episode 14: Episode #2.14

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Season 2, Episode 15: Episode #2.15

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Season 2, Episode 16: Episode #2.16

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Season 2, Episode 17: Episode #2.17

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Season 2, Episode 18: Episode #2.18

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Season 2, Episode 19: Episode #2.19

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Season 2, Episode 20: Episode #2.20

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Season 2, Episode 21: Episode #2.21

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Season 2, Episode 22: Episode #2.22

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