The Big Bang Theory The Hofstadter Isotope (Season 2, Episode 20)
TV-PG
TV Episode | 20 min | Comedy, Romance

Primary photo for The Hofstadter Isotope

The Big Bang Theory

The Hofstadter Isotope (Season 2, Episode 20)

TV-PG

TV Episode | 20 min | Comedy, Romance

Leonard is upset when the owner of the comic book store goes on a date with Penny, so he convinces Howard and Raj to take him to a bar so that he can pick up a woman of his own.

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Cast	+ Add Cast
8 cast members

Name	Known for
Johnny Galecki Leonard Hofstadter Leonard Hofstadter See fewer	The Big Bang Theory (2007)
Jim Parsons Sheldon Cooper Sheldon Cooper See fewer	The Big Bang Theory (2007)
Kaley Cuoco Penny Penny See fewer	The Big Bang Theory (2007)
Simon Helberg Howard Wolowitz Howard Wolowitz See fewer	Florence Foster Jenkins (2016)
Kunal Nayyar Raj Koothrappali Raj Koothrappali See fewer	The Big Bang Theory (2007)
Kevin Sussman Stuart Bloom Stuart Bloom See fewer	Burn After Reading (2008)
Ian Scott Rudolph Captain Sweatpants (uncredited) Captain Sweatpants (uncredited) See fewer	The Big Bang Theory (2007)
Lori Anne Shields Raj's Bar Lady (uncredited) Raj's Bar Lady (uncredited) See fewer	Black Friday (2010)