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New Roomies
Watch The Big Bang Theory Season 4 Episode 24
"The Roommate Transmogrification"
Original Air Date:

Raj moves in with Sheldon on the fourth season finale of The Big Bang Theory. This takes Penny by surprise.

Kunal Nayyar Promo Pic
Watch The Big Bang Theory Season 4 Episode 23
"The Engagement Reaction"
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When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.

Raj in Action
Watch The Big Bang Theory Season 4 Episode 22
"The Wildebeest Implementation"
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Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.

Sheldon Busts a Move
Watch The Big Bang Theory Season 4 Episode 21
"The Agreement Dissection"
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When Priya uses her lawyer skills to pick apart the roommate agreement, the girls take Sheldon dancing on this episode of TBBT.

Sheldon and Amy Photo
Watch The Big Bang Theory Season 4 Episode 20
"The Herb Garden Germination"
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Sheldon and Amy spread gossip this week. Elsewhere, Howard takes a big step in his relationship with Bernadette.

Nerds on a Mission
Watch The Big Bang Theory Season 4 Episode 19
"The Zarnecki Incursion"
Original Air Date:

Someone has the gall to hack into Sheldon's online game account this week. The guy go on a search to find out who would dare do such a thing.

Hi, Couple!
Watch The Big Bang Theory Season 4 Episode 18
"The Prestidigitation Approximation"
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Wolowitz baffles Sheldon this week with a magic trick. Elsewhere, Leonard realizes that there's a problem with him dating Priya.

The Toast Derivation Scene
Watch The Big Bang Theory Season 4 Episode 17
"The Toast Derivation"
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Sheldon struggles with a realization on this episode: Leonard who is actually the center of the social group.

The Cohabitation Formulation Scene
Watch The Big Bang Theory Season 4 Episode 16
"The Cohabitation Formulation"
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Wolowitz considers going all the way with Bernadette this week. Elsewhere, Leonard rekindles his relationship with Raj's sister.

The Benefactor Factor Scene
Watch The Big Bang Theory Season 4 Episode 15
"The Benefactor Factor"
Original Air Date:

A donor is willing to give Leonard a lot of money this week. In exchange for sex from him, that is.

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TBBT Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon