The Big Bang Theory2007 | TV Show

Cast & Crew  |  Episode Guide

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 (more…)

Premiered: September 24, 2007

Rating: TV-PG

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Season 4, Episode 17 The Toast Derivation

First Aired: February 24, 2011

Sheldon is in crisis when he realizes he's not the epicenter of the group, so, he decides to find new friends.

Previous Episode

The Cohabitation Formulation

Season 4, Episode 16

February 17, 2011

Next Episode

The Prestidigitation Approximation

Season 4, Episode 18

March 10, 2011

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