The Big Bang Theory Episodes

2007, TV Show

The Big Bang Theory Episode: "The Irish Pub Formulation"

Season 4, Episode 6
Episode Synopsis: Raj's sister visits and inadvertently causes trouble for the friends.
Original Air Date: Oct 28, 2010

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Season 4, Episode 6
Paid | iTunes
Length: 21:34
Aired: 10/28/2010
Also available on Amazon Instant Video and VUDU
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Premiered: September 24, 2007, on CBS
Rating: TV-PG
User Rating: (8,754 ratings)
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Premise: Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated. Like the universe after the big bang, the show's popularity expanded, thanks to breakout star Jim Parsons, along with the chemistry among the friends and the developing romance between Leonard and Penny. The addition of Melissa Rauch and Mayim Bialik in later seasons also enhanced the stories and relationships of the leads.

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