The Big Bang Theory

2007•12 series•Entertainment / Comedy

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Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics, but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then, that babe-alicious waitress/aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?

Episode 1The Conjugal Configuration

Sheldon and Amy's honeymoon runs aground in New York (S12 Ep1)

Episode 2The Wedding Gift Wormhole

Sheldon and Amy try to figure out the function of a wedding gift (S12 Ep2)

Episode 3The Procreation Calculation

Howard and Bernadette's life gets mixed up when Stuart brings a girl home (S12 Ep3)

Episode 4The Tam Turbulence

Leonard tries to find out why Sheldon has never mentioned Tam, his childhood friend (S12 Ep4)

Episode 5The Planetarium Collision

Sheldon sabotages Amy's career. Howard is asked to co-host Raj's show (S12 Ep5)

Episode 6The Imitation Perturbation

Howard dresses up as Sheldon for Halloween, but Sheldon gets his own back (S12 Ep6)

Episode 7The Grant Allocation Derivation

Leonard faces tough choices when he has to distribute extra grant money (S12 Ep7)

Episode 8The Consummation Deviation

Sheldon ends up having to bond with Amy's mother (S12 Ep8)

Episode 9The Citation Negation

Bernadette asks Stuart's girlfriend to teach her how to beat Howard at a game (S12 Ep9)

Episode 10The VCR Illumination

A VHS tape from Sheldon's past inspires him not to give up on his latest theory (S12 Ep10)

Episode 11The Paintball Scattering

Penny and Leonard organise a paintball game (S12 Ep11)

Episode 12The Propagation Proposition

Penny's former boyfriend Zack and his wife want to have a baby (S12 Ep12)

Episode 13The Confirmation Polarization

Sheldon and Amy's super-asymmetry theory is proved correct by two physicists from Chicago (S12 Ep13)

Episode 14The Meteorite Manifestation

Sheldon helps Howard and Bernadette navigate some bureaucratic paperwork (S12 Ep14)

Episode 15The Donation Oscillation

Penny attempts to sabotage Leonard's efforts to help her ex-boyfriend Zack (S12 Ep15)

Episode 16The D & D Vortex

The gang find out Wil Wheaton is hosting a celebrity game of Dungeons & Dragons (S12 Ep16)

Episode 17The Conference Valuation

Penny and Bernadette leave Howard in charge of the kids (S12 Ep17)

Episode 18The Laureate Accumulation

Sheldon and Amy ask Nobel laureates to take their side against competition (S12 Ep18)

Episode 19The Inspiration Deprivation

Amy has a meltdown over the possibility of winning a Nobel Prize (S12 Ep19)

Episode 20The Decision Reverberation

Raj worries after publishing a paper suggesting he may have found alien life (S12 Ep20)

Episode 21The Plagiarism Schism

Kripke finds proof that Dr Pemberton plagiarised his thesis (S12 Ep21)

Episode 22The Maternal Conclusion

Leonard is pleasantly surprised when his mother Beverly visits and is kind (S12 Ep22)

Episode 23The Change Constant

Sheldon and Amy await a telephone call from the Nobel Committee (S12 Ep23)

Episode 24The Stockholm Syndrome

Leonard and Penny keep a secret, and Sheldon and Amy stick together (S12 Ep24)

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