The Big Bang Theory

E01

Episode 1

★ 7.9

The Electric Can Opener Fluctuation

2009-09-21 · 22m

When Sheldon learns the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the guys following him, which threatens Leonard's hope for some romantic time with Penny and the guys' friendship with Sheldon.

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E02

Episode 2

★ 7.4

The Jiminy Conjecture

2009-09-28 · 21m

Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.

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E03

Episode 3

★ 7.5

The Gothowitz Deviation

2009-10-05 · 20m

Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.

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E04

Episode 4

★ 7.5

The Pirate Solution

2009-10-12 · 21m

Raj 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 a third wheel.

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E05

Episode 5

★ 7.7

The Creepy Candy Coating Corollary

2009-10-19 · 21m

After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one of her friends on a date with Wolowitz.

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E06

Episode 6

★ 7.1

The Cornhusker Vortex

2009-11-02 · 20m

Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.

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E07

Episode 7

★ 7.3

The Guitarist Amplification

2009-11-09 · 19m

A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism.

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E08

Episode 8

★ 8.3

The Adhesive Duck Deficiency

2009-11-16 · 21m

With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.

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E09

Episode 9

★ 7.8

The Vengeance Formulation

2009-11-23 · 19m

After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.

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E10

Episode 10

★ 7.9

The Gorilla Experiment

2009-12-07 · 21m

Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.

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E11

Episode 11

★ 7.6

The Maternal Congruence

2009-12-14 · 20m

A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she'll approve of his romance with Penny.

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E12

Episode 12

★ 7.9

The Psychic Vortex

2010-01-11 · 19m

Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university mixer.

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E13

Episode 13

★ 7.7

The Bozeman Reaction

2010-01-18 · 20m

When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

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E14

Episode 14

★ 8.0

The Einstein Approximation

2010-02-01 · 19m

Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.

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E15

Episode 15

★ 7.7

The Large Hadron Collision

2010-02-08 · 21m

Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator) in Switzerland on Valentine's Day.

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E16

Episode 16

★ 7.9

The Excelsior Acquisition

2010-03-01 · 21m

Sheldon winds up in traffic court when he gets a ticket because of Penny.

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E17

Episode 17

★ 8.0

The Precious Fragmentation

2010-03-08 · 20m

When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.

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E18

Episode 18

★ 8.0

The Pants Alternative

2010-03-22 · 21m

Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.

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E19

Episode 19

★ 7.5

The Wheaton Recurrence

2010-04-12 · 21m

A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.

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E20

Episode 20

★ 7.8

The Spaghetti Catalyst

2010-05-03 · 20m

When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.

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E21

Episode 21

★ 7.4

The Plimpton Stimulation

2010-05-10 · 21m

Leonard and Sheldon compete for the attention of a famous female physicist.

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E22

Episode 22

★ 8.4

The Staircase Implementation

2010-05-17 · 20m

Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.

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E23

Episode 23

★ 7.8

The Lunar Excitation

2010-05-24 · 20m

While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.

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