Season 3
Episodes
S3 · E1 · 21 Sept 2009 · 22 min
The Electric Can Opener Fluctuation
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.
S3 · E2 · 28 Sept 2009 · 21 min
The Jiminy Conjecture
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.
S3 · E3 · 5 Oct 2009 · 20 min
The Gothowitz Deviation
Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.
S3 · E4 · 12 Oct 2009 · 21 min
The Pirate Solution
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.
S3 · E5 · 19 Oct 2009 · 21 min
The Creepy Candy Coating Corollary
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.
S3 · E6 · 2 Nov 2009 · 20 min
The Cornhusker Vortex
Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.
S3 · E7 · 9 Nov 2009 · 19 min
The Guitarist Amplification
A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism.
S3 · E8 · 16 Nov 2009 · 21 min
The Adhesive Duck Deficiency
With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
S3 · E9 · 23 Nov 2009 · 19 min
The Vengeance Formulation
After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.
S3 · E10 · 7 Dec 2009 · 21 min
The Gorilla Experiment
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.
S3 · E11 · 14 Dec 2009 · 20 min
The Maternal Congruence
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.
S3 · E12 · 11 Jan 2010 · 19 min
The Psychic Vortex
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.
S3 · E13 · 18 Jan 2010 · 20 min
The Bozeman Reaction
When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
S3 · E14 · 1 Feb 2010 · 19 min
The Einstein Approximation
Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.
S3 · E15 · 8 Feb 2010 · 21 min
The Large Hadron Collision
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.
S3 · E16 · 1 Mar 2010 · 21 min
The Excelsior Acquisition
Sheldon winds up in traffic court when he gets a ticket because of Penny.
S3 · E17 · 8 Mar 2010 · 20 min
The Precious Fragmentation
When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.
S3 · E18 · 22 Mar 2010 · 21 min
The Pants Alternative
Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.
S3 · E19 · 12 Apr 2010 · 21 min
The Wheaton Recurrence
A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.
S3 · E20 · 3 May 2010 · 20 min
The Spaghetti Catalyst
When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.
S3 · E21 · 10 May 2010 · 21 min
The Plimpton Stimulation
Leonard and Sheldon compete for the attention of a famous female physicist.
S3 · E22 · 17 May 2010 · 20 min
The Staircase Implementation
Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.
S3 · E23 · 24 May 2010 · 20 min
The Lunar Excitation
While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.
Data and images from TMDB.