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The Big Bang Theory

Leonard and Sheldon are brilliant physicists, but none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty, Penny, moves in next door. Sheldon is content spending his nights playing Klingon Boggle with their socially dysfunctional friends. However, Leonard sees in Penny a whole new universe of possibilities ... including love.
IMDb 8.1200617 episodes
TV-PG
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Episodes

  1. S1 E1 - Pilot
    September 23, 2007
    23min
    TV-14
    Two brainy best friends, Leonard and Sheldon , could tell you anything you want to know about quantum physics -- but when it comes to dealing with everyday life here on Earth, they're lost in the cosmos.
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  2. S1 E2 - The Big Bran Hypothesis
    September 30, 2007
    21min
    TV-PG
    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, Leonard sees his attempt at chivalry go horribly awry.
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  3. S1 E3 - The Fuzzyboots Corollary
    October 7, 2007
    22min
    TV-PG
    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. Recurring guest star SARA GILBERT appears as Leslie.
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  4. S1 E4 - The Luminous Fish Effect
    October 14, 2007
    21min
    TV-PG
    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.
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  5. S1 E5 - The Hamburger Postulate
    October 21, 2007
    20min
    TV-PG
    After sensing that his pursuit of Penny isn't going anywhere, Leonard agrees to an unexpected sexual encounter with fellow scientist Leslie Winkle. The one-night stand throws Leonard and Sheldon deep into uncharted social waters.
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  6. S1 E6 - The Middle Earth Paradigm
    October 28, 2007
    21min
    TV-PG
    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.
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  7. S1 E7 - The Dumpling Paradox
    November 4, 2007
    21min
    TV-14
    When Wolowitz seduces Penny's friend and ends up having sex 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.
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  8. S1 E8 - The Grasshopper Experiment
    November 11, 2007
    20min
    TV-14
    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.
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  9. S1 E9 - The Cooper-Hofstadter Polarization
    March 16, 2008
    20min
    TV-PG
    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.
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  10. S1 E10 - The Loobenfeld Decay
    March 23, 2008
    21min
    TV-14
    After hearing Penny sing, Leonard lies to avoid seeing her perform; Sheldon goes a step further. D.J. QUALL guest stars.
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  11. S1 E11 - The Pancake Batter Anomaly
    March 30, 2008
    22min
    TV-PG
    When Sheldon gets sick, 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.
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  12. S1 E12 - The Jerusalem Duality
    April 13, 2008
    20min
    TV-14
    When Leonard and Sheldon meet a teenage physics prodigy, Sheldon is distraught that the boy genius is younger and smarter, and crafts a plan to derail the young prodigy's research.
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  13. S1 E13 - The Bat Jar Conjecture
    April 20, 2008
    22min
    TV-14
    The guys kick Sheldon off the team for the Physics Bowl and enlist his nemesis Leslie Winkle (recurring guest star SARA GILBERT) to take his place.
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  14. S1 E14 - The Nerdvana Annihilation
    April 27, 2008
    20min
    TV-PG
    When the guys buy a time-machine prop from a classic movie, Penny's reaction forces Leonard to take a hard look at his life.
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  15. S1 E15 - The Pork Chop Indeterminacy
    May 4, 2008
    22min
    TV-14
    Leonard, Wolowitz, and Koothrappali all become smitten with Sheldon's twin sister, Missy (guest star COURTNEY HENGGELER), but Sheldon declares he will decide whom his sister dates.
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  16. S1 E16 - The Peanut Reaction
    May 11, 2008
    20min
    TV-14
    When Penny attempts to throw Leonard a wild surprise party, Sheldon gets in the way.
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  17. S1 E17 - The Tangerine Factor
    May 18, 2008
    20min
    TV-PG
    When Penny breaks up with her boyfriend, Leonard finally gets up the courage to ask her out on a date. When she says yes, each seeks the "wisdom" of Sheldon, a reluctant advisor.
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