The Big Bang Theory

Season 2 Episode 20: The Hofstadter Isotope

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

Genre:

Comedy

Seasons:

12

Episodes:

279

Cast:

Johnny Galecki, Jim Parsons, Kaley Cuoco

Quality:

HD

Duration:

20 min

First Air:

2007

Rating:

7.9