The Big Bang Theory

E01

Episode 1

★ 8.0

The Robotic Manipulation

2010-09-23 · 21m

Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.

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E02

Episode 2

★ 7.7

The Cruciferous Vegetable Amplification

2010-09-30 · 21m

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

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E03

Episode 3

★ 7.5

The Zazzy Substitution

2010-10-07 · 21m

The guys are concerned as Sheldon searches for an alternative to human companionship.

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E04

Episode 4

★ 7.6

The Hot Troll Deviation

2010-10-14 · 20m

An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.

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E05

Episode 5

★ 7.3

The Desperation Emanation

2010-10-21 · 21m

Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.

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E06

Episode 6

★ 7.5

The Irish Pub Formulation

2010-10-28 · 22m

Leonard keeps an affair a secret from Sheldon, Howard and Raj.

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E07

Episode 7

★ 7.5

The Apology Insufficiency

2010-11-04 · 21m

Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.

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E08

Episode 8

★ 7.7

The 21-Second Excitation

2010-11-11 · 19m

While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

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E09

Episode 9

★ 7.9

The Boyfriend Complexity

2010-11-18 · 21m

Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.

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E10

Episode 10

★ 7.4

The Alien Parasite Hypothesis

2010-12-09 · 20m

Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.

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E11

Episode 11

★ 7.9

The Justice League Recombination

2010-12-16 · 20m

The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.

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E12

Episode 12

★ 7.4

The Bus Pants Utilization

2011-01-06 · 21m

Leonard's idea for a smartphone app derails his friendship with Sheldon.

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E13

Episode 13

★ 7.7

The Love Car Displacement

2011-01-20 · 21m

Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.

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E14

Episode 14

★ 7.5

The Thespian Catalyst

2011-02-03 · 21m

Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.

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E15

Episode 15

★ 7.4

The Benefactor Factor

2011-02-10 · 20m

A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.

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E16

Episode 16

★ 7.4

The Cohabitation Formulation

2011-02-17 · 20m

As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.

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E17

Episode 17

★ 7.6

The Toast Derivation

2011-02-24 · 21m

Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.

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E18

Episode 18

★ 7.6

The Prestidigitation Approximation

2011-03-10 · 21m

Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.

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E19

Episode 19

★ 7.6

The Zarnecki Incursion

2011-03-31 · 21m

Sheldon's online-game account is hacked by Todd Zarnecki, who then proceeds to steal all his items prompting the guys to go on a quest to retrieve them. Penny, Bernadette and Amy discuss how Penny groomed Leonard to be willing to try various things and more adventurous boyfriend... for some other woman — Priya.

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E20

Episode 20

★ 7.9

The Herb Garden Germination

2011-04-07 · 21m

Sheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.

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E21

Episode 21

★ 7.4

The Agreement Dissection

2011-04-28 · 21m

When Leonard spends too much time in the shower with Priya, Sheldon charges Leonard with two violations of the roommate agreement. However, before he can get too far, Priya uses her skills as a lawyer to nullify the charges due to the agreement's vague wording, much to Sheldon's dismay. When the guys take advantage of Priya's skills in order to eat Greek food on pizza night, Sheldon goes to Penny, who invites him to a girls' night out with Amy and Bernadette, which Sheldon agrees to after Penny mentions that they may be talking trash about Priya. After the girls drink some cocktails, they decide to take Sheldon dancing, which Sheldon reluctantly goes along with. After dancing, Sheldon takes an intoxicated Amy back to her apartment and as well as talking about Priya, meets a monkey who is addicted to smoking cigarettes. Amy tells Sheldon not to give in to Priya's law skills, before kissing him and going to her bathroom to vomit.

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E22

Episode 22

★ 7.1

The Wildebeest Implementation

2011-05-05 · 21m

Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.

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E23

Episode 23

★ 7.6

The Engagement Reaction

2011-05-12 · 20m

When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.

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E24

Episode 24

★ 7.6

The Roommate Transmogrification

2011-05-19 · 21m

When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she's regrets.

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