The Big Bang Theory

1The Electric Can Opener Fluctuation

22 minSep 21, 2009★ 7.9

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.

2The Jiminy Conjecture

21 minSep 28, 2009★ 7.4

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.

3The Gothowitz Deviation

20 minOct 5, 2009★ 7.5

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

4The Pirate Solution

21 minOct 12, 2009★ 7.5

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.

5The Creepy Candy Coating Corollary

21 minOct 19, 2009★ 7.7

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.

6The Cornhusker Vortex

20 minNov 2, 2009★ 7.1

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

7The Guitarist Amplification

19 minNov 9, 2009★ 7.3

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

8The Adhesive Duck Deficiency

21 minNov 16, 2009★ 8.3

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

9The Vengeance Formulation

19 minNov 23, 2009★ 7.8

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

10The Gorilla Experiment

21 minDec 7, 2009★ 7.9

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.

11The Maternal Congruence

20 minDec 14, 2009★ 7.6

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.

12The Psychic Vortex

19 minJan 11, 2010★ 7.9

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.

13The Bozeman Reaction

20 minJan 18, 2010★ 7.7

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

14The Einstein Approximation

19 minFeb 1, 2010★ 8.0

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

15The Large Hadron Collision

21 minFeb 8, 2010★ 7.7

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.

16The Excelsior Acquisition

21 minMar 1, 2010★ 7.9

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

17The Precious Fragmentation

20 minMar 8, 2010★ 8.0

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

18The Pants Alternative

21 minMar 22, 2010★ 8.0

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

19The Wheaton Recurrence

21 minApr 12, 2010★ 7.5

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

20The Spaghetti Catalyst

20 minMay 3, 2010★ 7.8

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

21The Plimpton Stimulation

21 minMay 10, 2010★ 7.4

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

22The Staircase Implementation

20 minMay 17, 2010★ 8.4

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

23The Lunar Excitation

20 minMay 24, 2010★ 7.8

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