The Big Bang Theory

The Big Bang Theory

University physicists Leonard and Sheldon know whether to use an integral or a differential to solve the area under a curve. But they don’t have a clue about girls. Or dating. Or clothes. Or parties. Or having fun. Or, basically, life. So when a pretty blonde named Penny moves in the apartment across the hall, the guys decide to get an education outside of the classroom. Boys, you have a lot to learn. With series creators Chuck Lorre (Two and a Half Men) and Bill Prady (The Gilmore Girls) concocting the right mix of logic and lunacy and stars Johnny Galecki (Roseanne) and Jim Parsons (Judging Amy) turning geekdom into Phi Beta fun, The Big Bang Theory is big on laughs. And life.
University physicists Leonard and Sheldon know whether to use an integral or a differential to solve the area under a curve. But they don’t have a clue about girls. Or dating. Or clothes. Or parties. Or having fun. Or, basically, life. So when a pretty blonde named Penny moves in the apartment across the hall, the guys decide to get an education outside of the classroom. Boys, you have a lot to learn. With series creators Chuck Lorre (Two and a Half Men) and Bill Prady (The Gilmore Girls) concocting the right mix of logic and lunacy and stars Johnny Galecki (Roseanne) and Jim Parsons (Judging Amy) turning geekdom into Phi Beta fun, The Big Bang Theory is big on laughs. And life.

Season 1 (17 episodes)

  • 1. Pilot

    Original air date: 09/24/2007 Runtime: 22:49 min.

    Original air date: 09/24/2007 Runtime: 22:49 min. In the series premiere, when Leonard and Sheldon meet Penny, Leonard is immediately interested in her. But Sheldon feels his friend is chasing a dream he'll never catch.

  • 2. The Big Bran Hypothesis

    Original air date: 10/01/2007 Runtime: 21:02 min.

    Original air date: 10/01/2007 Runtime: 21:02 min. After Leonard tries to do a favor for Penny, Sheldon ruins the plan. Leonard volunteers to sign for a package, hoping to make a good impression on Penny. However, when he involves his obsessive-compulsive roommate, Leonard sees his attempt at chivalry go horribly awry.

  • 3. The Fuzzyboots Corollary

    Original air date: 10/08/2007 Runtime: 21:58 min.

    Original air date: 10/08/2007 Runtime: 21:58 min. Leonard is depressed to learn that Penny is dating someone. As a result, encouraged by his friends and fellow scientists, Leonard actually summons the nerve to ask a woman out on a date. SARA GILBERT ("Roseanne") guest stars as Leslie.

  • 4. The Luminous Fish Effect

    Original air date: 10/15/2007 Runtime: 20:35 min.

    Original air date: 10/15/2007 Runtime: 20:35 min. After being fired from his job, Sheldon attempts to explore the "dreadful" life beyond physics. But his initial thrill of shopping with Penny devolves over time to him weaving ponchos as a shut-in, forcing Leonard to call on Sheldon's mother, Mary (LAURIE METCALF - "Roseanne").

  • 5. The Hamburger Postulate

    Original air date: 10/22/2007 Runtime: 20:06 min.

    Original air date: 10/22/2007 Runtime: 20:06 min. After sensing that his pursuit of Penny isn't going anywhere, Leonard agrees to an unexpected sexual encounter with fellow scientist Leslie Winkle (recurring guest star SARA GILBERT). The one-night stand throws Leonard and Sheldon deep into uncharted social waters.

  • 6. The Middle Earth Paradigm

    Original air date: 10/29/2007 Runtime: 20:57 min.

    Original air date: 10/29/2007 Runtime: 20:57 min. The socially stunted guys are nervous when Penny invites them to a party she's hosting. But they are ecstatic to find out that it's a Halloween party and enthusiastically don their respective nerdy costumes, which unfortunately fail to impress Penny's brutish ex-boyfriend. Afterwards, Koothrappali experiences the unexpected with a partygoer, Cheryl (ERIN ALLIN).

  • 7. The Dumpling Paradox

    Original air date: 11/05/2007 Runtime: 21:09 min.

    Original air date: 11/05/2007 Runtime: 21:09 min. When Wolowitz seduces Penny's friend and ends up sleeping with her in Penny's apartment, Penny sleeps on Leonard and Sheldon's couch. Meanwhile, with Wolowitz occupied, the guys discover that they are without a fourth member of their group. In desperation, they ask Penny to join one of their two-person Halo teams.

  • 8. The Grasshopper Experiment

    Original air date: 11/12/2007 Runtime: 20:06 min.

    Original air date: 11/12/2007 Runtime: 20:06 min. Koothrappali becomes overwhelmed when his parents arrange a blind date for him, but he discovers he actually can talk to a member of the opposite sex after a few drinks. However, complications arise when his beautiful date shows more interest in Sheldon.

  • 9. The Cooper-Hofstadter Polarization

    Original air date: 03/17/2008 Runtime: 19:27 min.

    Original air date: 03/17/2008 Runtime: 19:27 min. Sheldon and Leonard are invited to present their joint findings at a physics conference, but Sheldon refuses. Penny steps in to mediate, but this only deepens the rift between the two best friends.

  • 10. The Loobenfeld Decay

    Original air date: 03/24/2008 Runtime: 20:37 min.

    Original air date: 03/24/2008 Runtime: 20:37 min. After hearing Penny sing, Leonard lies to avoid seeing her perform. Sheldon goes one step further with a more elaborate lie, leading to the appearance of his nonexistent cousin. D.J. QUALLS ("Road Trip") guest stars.

  • 11. The Pancake Batter Anomaly

    Original air date: 03/31/2008 Runtime: 21:55 min.

    Original air date: 03/31/2008 Runtime: 21:55 min. When Sheldon gets sick, Leonard and the boys know what is in store for them and avoid him like the plague, this leaves an unsuspecting Penny to nurse the world's worst patient back to health.

  • 12. The Jerusalem Duality

    Original air date: 04/14/2008 Runtime: 20:02 min.

    Original air date: 04/14/2008 Runtime: 20:02 min. When Leonard and Sheldon meet a 15-year-old physics prodigy, Sheldon is distraught that this boy genius is younger and smarter. In an attempt to restore a sense of purpose, the boys come up with a solution to derail the young prodigy's research.

  • 13. The Bat Jar Conjecture

    Original air date: 04/21/2008 Runtime: 21:38 min.

    Original air date: 04/21/2008 Runtime: 21:38 min. The guys decide to compete in the university's Physics Bowl, but since Sheldon's only focus is to prove his mental superiority, the guys kick him off the team. To take his spot, they enlist his nemesis Leslie Winkle (recurring guest star SARA GILBERT).

  • 14. The Nerdvana Annihilation

    Original air date: 04/28/2008 Runtime: 20:00 min.

    Original air date: 04/28/2008 Runtime: 20:00 min. When Leonard and the guys buy a time-machine prop from a classic 1960 movie, its arrival creates problems for Penny, and she tells the boys that their obsession with comics and toys is "pathetic."

  • 15. The Shiksa Indeterminacy

    Original air date: 05/05/2008 Runtime: 21:50 min.

    Original air date: 05/05/2008 Runtime: 21:50 min. Leonard, Wolowitz, and Koothrappali all become smitten with Sheldon's twin sister, Missy (guest star COURTNEY HENGGELER), and Leonard devises a plan to eliminate his rivals. The plan backfires, however, when Sheldon declares he will decide whom his sister dates.

  • 16. The Peanut Reaction

    Original air date: 05/12/2008 Runtime: 19:45 min.

    Original air date: 05/12/2008 Runtime: 19:45 min. When Penny learns that Leonard doesn't celebrate birthdays, she attempts to throw him a surprise party, she is sidetracked by Sheldon, however, who unexpectedly gets to live out one of his greatest fantasies at an electronics store.

  • 17. The Tangerine Factor

    Original air date: 05/19/2008 Runtime: 20:05 min.

    Original air date: 05/19/2008 Runtime: 20:05 min. When Penny breaks up with her boyfriend, Leonard finally gets up the courage to ask her out on a real date. When she says yes, each seeks the "wisdom" of a reluctant advisor -- Sheldon.