The Big Bang Theory

2007•12 series•Entertainment / Comedy
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Available on
Channel 4

Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics, but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then, that babe-alicious waitress/aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?

Pilot: Episode Image
Episode 1Pilot

Leonard and Sheldon's geeky world is shaken up by the arrival of a new neighbour (S1 Ep1)

The Big Bran Hypothesis: Episode Image
Episode 2The Big Bran Hypothesis

Sheldon sneaks into Penny's apartment to tidy it, but she's not pleased (S1 Ep2)

The Fuzzy Boots Corollary: Episode Image
Episode 3The Fuzzy Boots Corollary

The Fuzzyboots Corollary: Leonard summons up the courage to ask a woman out on a date (S1 Ep3)

The Luminous Fish Effect: Episode Image
Episode 4The Luminous Fish Effect

Getting fired leaves Sheldon pondering life beyond physics (S1 Ep4)

The Hamburger Postulate: Episode Image
Episode 5The Hamburger Postulate

Sheldon is uncomfortable with a change to his hamburger routine (S1 Ep5)

The Middle Earth Paradigm: Episode Image
Episode 6The Middle Earth Paradigm

Penny's Halloween party puts the gang's social skills to the test (S1 Ep6)

The Dumpling Paradox: Episode Image
Episode 7The Dumpling Paradox

Penny needs somewhere to sleep when Howard sleeps over in her flat with her friend (S1 Ep7)

The Grasshopper Experiment: Episode Image
Episode 8The Grasshopper Experiment

Raj discovers that he can talk to women when he's had a few drinks (S1 Ep8)

The Cooper-Hofstadter Polarization: Episode Image
Episode 9The Cooper-Hofstadter Polarization

Sheldon and Howard fall out over sharing credit on a co-authored work (S1 Ep9)

The Loobenfeld Decay: Episode Image
Episode 10The Loobenfeld Decay

Sheldon lies to get out of seeing Penny acting on stage. But one lie leads to another (S1 Ep10)

The Pancake Batter Anomaly: Episode Image
Episode 11The Pancake Batter Anomaly

Penny makes the mistake of volunteering to look after Sheldon when he's sick (S1 Ep11)

The Jerusalem Duality: Episode Image
Episode 12The Jerusalem Duality

Sheldon is rattled by a teenage physicist who is clearly much brighter than he is (S1 Ep12)

The Nerdvana Annihilation: Episode Image
Episode 14The Nerdvana Annihilation

Leonard considers giving up collecting memorabilia when Penny makes fun of him (S1 Ep14)

The Shiksa Indeterminacy: Episode Image
Episode 15The Shiksa Indeterminacy

Leonard, Howard and Raj compete for the attention of Sheldon's hot twin sister (S1 Ep15)

The Peanut Reaction: Episode Image
Episode 16The Peanut Reaction

Penny plans a surprise party for Leonard, but things don't exactly go to plan (S1 Ep16)

The Tangerine Factor: Episode Image
Episode 17The Tangerine Factor

When Penny breaks up with her boyfriend, Leonard plucks up the courage to ask her out (S1 Ep17)

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