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

User Rating: (8,996 ratings)

Your Rating:

Season 2, Episode 20 The Hofstadter Isotope

First Aired: April 13, 2009

Penny is romanced by a friend of the guys' while at a comic-book store. Meanwhile, Leonard and Wolowitz search for love at a bar's ladies' night.

Watch Now

Previous Episode

The Dead Hooker Juxtaposition

Season 2, Episode 19

March 30, 2009

Next Episode

The Vegas Renormalization

Season 2, Episode 21

April 27, 2009

Trending TonightSee all »

Shop