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The Big Bang Theory
Cast & Crew
The Hesitation Ramification
As Leonard tries to help Penny with a disappointment, Penny asks him a bold question about their relationship; Sheldon wants to learn how to be funny.
The Cooper Extraction
While Sheldon is in Texas, the rest of the gang realize how much he has changed their lives as they decorate the apartment Christmas tree.
The Discovery Dissipation
Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard for a week.
The Thanksgiving Decoupling
When the gang decides to spend Thanksgiving at Mrs. Wolowitz's house, Sheldon protests; Leonard and Penny deal with an error from her past.
The Itchy Brain Simulation
When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex.
The Proton Displacement
When Professor Proton asks Leonard for help with an experiment, Sheldon retaliates by befriending Proton's rival, Bill Nye.
The Romance Resonance
Sheldon's latest scientific breakthrough leaves him feeling like a fraud; a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard.
The Workplace Proximity
Sheldon and Amy's relationship is tested when she takes a job at his university; a fight with Bernadette leaves Howard sleeping on Raj's couch.
The Raiders Minimization
Sheldon wants revenge after Amy ruins one of his favorite films; Leonard finds a way to get Penny to do anything; Stuart and Raj make online dating profiles.
The Scavenger Vortex
Raj designs a scavenger hunt that brings out the best -- and the worst -- in the whole gang.
The Hofstadter Insufficiency; The Deception Verification
Sheldon and Penny share secrets while Leonard is away; Raj needs help getting over his ex; Wolowitz's relationship with his mom threatens his masculinity.
The Deception Verification
Leonard and Sheldon's friendship is tested; Wolowitz's relationship with his mom causes a threat to his masculinity.
The Hofstadter Insufficiency
Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.
The Bon Voyage Reaction
When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.
The Love Spell Potential
Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons"; Lucy and Koothrappali have an awkward date.
The Proton Resurgence
Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet.
The Closure Alternative
Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy.
The Tenure Turbulence
The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.
The Closet Reconfiguration
Howard considers whether or not he should open a letter from his father; Penny and Leonard host a "grown-up" cocktail party.
The Contractual Obligation Implementation
Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers; Raj plans a date with Lucy.
The Monster Isolation
After a bad date, Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.
The Tangible Affection Proof
The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a "lonely people" party at the comic book store.
The Spoiler Alert Segmentation
A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements; while Howard is away, Raj helps Mrs. Wolowitz out.
The Cooper/Kripke Inversion
Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.
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