The Big Bang Theory · Season 3 23 Episodes

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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.

Episodes

NoFirst Air DateNameOverview
3x1The 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.
3x2The 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.
3x3The 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.
3x4The 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.
3x5The 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.
3x6The Cornhusker VortexSheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.
3x7The Guitarist AmplificationA squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism.
3x8The Adhesive Duck DeficiencyWith Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
3x9The 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.
3x10The 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.
3x11The 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.
3x12The 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.
3x13The Bozeman ReactionWhen their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
3x14The Einstein ApproximationSheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.
3x15The 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.
3x16The Excelsior AcquisitionSheldon winds up in traffic court when he gets a ticket because of Penny.
3x17The Precious FragmentationWhen the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.
3x18The Pants AlternativeSheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.
3x19The Wheaton RecurrenceA fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.
3x20The Spaghetti CatalystWhen Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.
3x21The Plimpton StimulationLeonard and Sheldon compete for the attention of a famous female physicist.
3x22The Staircase ImplementationLeonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.
3x23The Lunar ExcitationWhile Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.

Cast

CharacterPerson
Leonard HofstadterJohnny Galecki
Sheldon CooperJim Parsons
PennyKaley Cuoco
Howard WolowitzSimon Helberg
Rajesh KoothrappaliKunal Nayyar

Crew

DepartmentJobPerson
ArtProduction DesignJohn Shaffner
Set DecorationAnn Shea
CameraDirector of PhotographySteven V. Silver
Costume & Make-UpCostume DesignMary T. Quigley
HairstylistFaye Woods
Makeup ArtistPeggy Nichols
CrewProperty MasterScott L. London
Scientific ConsultantDavid Saltzberg
DirectingFirst Assistant DirectorAnthony Joseph Rich
Second Assistant DirectorChris Klausen
EditingEditorPeter Chakos
LightingGafferJohn Greene
ProductionAssociate ProducerBrian George
CastingKen Miller
Nikki Valko
Co-Executive ProducerDavid Goetsch
Eric Kaplan
Steven Molaro
Co-ProducerKelly-Anne Lee
Kristy Cecil
Mary T. Quigley
Steve Holland
Consulting ProducerRichard A. Rosenstock
Coordinating ProducerMona Garcea
Executive ConsultantDon Foster
Eddie Gorodetsky
Mark Roberts
Executive ProducerBill Prady
Chuck Lorre
Lee Aronsohn
ProducerFaye Oshima Belyeu
Jim Reynolds
Peter Chakos
Unit Production ManagerKelly-Anne Lee
SoundProduction Sound MixerBruce Peters
Sound Re-Recording MixerBob La Masney
Charlie McDaniel
Sound mixerBruce Peters
Theme Song PerformanceBarenaked Ladies