The Big Bang Theory

The Big Bang Theory

The Hofstadter Isotope (2x20)


Air date: Apr 13, 2009

When a fellow comic book enthusiast hits on Penny it leads to Leonard and Howard going to a bar's on Ladies' Night.

  • Premiered: Sep 2007
  • Episodes: 279
  • Followers: 54,4k
  • Ended
  • CBS
  • Thursday at 20