Details
- Season
- Season 2
- Episode
- S02xE20
- Air Date
- 13 April 2009
- Where to watch
Overview
The Big Bang Theory season 2, episode 20 — “The Hofstadter Isotope” (S02xE20) first aired on 13 April 2009.
A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.