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 Conjecture

The gang face an awkward morning after Sheldon's mum and Leonard's dad connect (S10 Ep1)

Episode 2The Military Miniaturization

Howard has a meeting with the Air Force about the gyroscope he invented (S10 Ep2)

Episode 3The Dependence Transcendence

The guys work around the clock on the Air Force project (S10 Ep3)

Episode 4The Cohabitation Experimentation

Amy proposes a 'cohabitation experiment' with Sheldon (S10 Ep4)

Episode 5The Hot Tub Contamination

Sheldon and Amy argue. Howard and Bernadette are visited by unexpected guests (S10 Ep5)

Episode 6The Fetal Kick Catalyst

Sheldon and Amy host a brunch at Penny's flat. Howard makes an impulsive purchase (S10 Ep6)

Episode 7The Veracity Elasticity

Amy tells Sheldon the completed repair work on her flat is still ongoing (S10 Ep7)

Episode 8The Brain Bowl Incubation

Sheldon goes to great lengths to convince Amy that they should have a baby (S10 Ep8)

Episode 9The Geology Elevation

Sheldon is jealous when he hears that Bert the geologist has won a fellowship (S10 Ep9)

Episode 10The Property Division Collision

Sheldon, Amy, Leonard and Penny divide their possessions (S10 Ep10)

Episode 11The Birthday Synchronicity

Bernadette goes into labour on Amy's birthday (S10 Ep11)

Episode 12The Holiday Summation

The gang hear all about Sheldon and Amy's terrible Christmas holiday trip to Texas (S10 Ep12)

Episode 13The Romance Recalibration

Penny thinks Leonard takes her for granted so she takes a spa weekend with Amy (S10 Ep13)

Episode 14The Emotion Detection Automation

Sheldon tests a device after hearing that it can help him read emotions (S10 Ep14)

Episode 15The Locomotion Reverberation

Leonard and Howard pack Sheldon off on a historic railway trip (S10 Ep15)

Episode 16The Allowance Evaporation

Amy learns Sheldon has shared intimate details of their relationship (S10 Ep16)

Episode 17The Comic-Con Conundrum

Cut off from his father's fortune, Raj appoints Sheldon to organise his finances (S10 Ep17)

Episode 18The Escape Hatch Identification

Leonard and Penny offer Sheldon's old room to Raj (S10 Ep18)

Episode 19The Collaboration Fluctuation

Raj settles in with Leonard and Penny. Sheldon and Amy work on a project (S10 Ep19)

Episode 20The Recollection Dissipation

Sheldon exhausts himself when he collaborates on two projects in one day (S10 Ep20)

Episode 21The Separation Agitation

Bernadette returns to work but finds it upsetting to leave Halley at the nursery (S10 Ep21)

Episode 22The Cognition Regeneration

Leonard isn't thrilled when Penny's former boyfriend Zack offers her a new job (S10 Ep22)

Episode 23The Gyroscopic Collapse

Amy is offered a fellowship at Princeton. The guys' project spins out of control (S10 Ep23)

Episode 24The Long Distance Dissonance

Sheldon's former admirer, Dr Ramona Nowitzki, resurfaces while Amy is away (S10 Ep24)

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