The Big Bang Theory: Season 2 Episode 20: The Hofstadter Isotope
Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Carol Ann Susi
Length: 20 minutes
On Air Date: 2 Jun 2009
The Big Bang Theory: S02E20 Description: Leonard is so upset when a friend from the comic book store begins dating Penny that he convinces Howard and Raj to take him to a bar so that he can pick up a woman of his own.