The Big Bang Theory

Season 3

TV-PG

100%92%

Worlds collide in Season 3! A love affair with Penny has opened a big, wide, wonderful world of romance for Leonard. But Sheldon likes the world just the way it was, thank you. All of which makes for a zany comic triangle with brainy, clueless Sheldon and practical, grounded Penny hilariously vying for the role of hypotenuse.

Where to Watch Season 3

23 Episodes

The Electric Can Opener Fluctuation
E1
The Electric Can Opener FluctuationWhen 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.
The Jiminy Conjecture
E2
The Jiminy ConjectureLeonard 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.
The Gothowitz Deviation
E3
The Gothowitz DeviationHoward and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.
The Pirate Solution
E4
The Pirate SolutionRaj 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.
The Creepy Candy Coating Corollary
E5
The Creepy Candy Coating CorollaryAfter 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.
The Cornhusker Vortex
E6
The Cornhusker VortexSheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.
The Guitarist Amplification
E7
The Guitarist AmplificationAn argument between Leonard and Penny proves "inconvenient" to Sheldon.
The Adhesive Duck Deficiency
E8
The Adhesive Duck DeficiencyWith Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
The Vengeance Formulation
E9
The Vengeance FormulationAfter he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.
The Gorilla Experiment
E10
The Gorilla ExperimentPenny 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.
The Maternal Congruence
E11
The Maternal CongruenceA 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.
The Psychic Vortex
E12
The Psychic VortexLeonard 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.
The Bozeman Reaction
E13
The Bozeman ReactionWhen their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
The Einstein Approximation
E14
The Einstein ApproximationSheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.
The Large Hadron Collision
E15
The Large Hadron CollisionLeonard 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.
The Excelsior Acquisition
E16
The Excelsior AcquisitionSheldon winds up in traffic court when he gets a ticket because of Penny.
The Precious Fragmentation
E17
The Precious FragmentationWhen the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.
The Pants Alternative
E18
The Pants AlternativeSheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.
The Wheaton Recurrence
E19
The Wheaton RecurrenceA fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.
The Spaghetti Catalyst
E20
The Spaghetti CatalystWhen Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.
The Plimpton Stimulation
E21
The Plimpton StimulationLeonard and Sheldon compete for the attention of a famous female physicist.
The Staircase Implementation
E22
The Staircase ImplementationLeonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.
The Lunar Excitation
E23
The Lunar ExcitationWhile Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.