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The Big Bang Theory

The Hofstadter Isotope

Directed by Mark Cendrowski
TV-PG
S2 • E20    Apr 13, 2009    20m
7.87.6
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A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

Where to Watch The Big Bang Theory - S2 • E20

Cast of The Hofstadter Isotope

  • Johnny GaleckiLeonard Hofstadter
  • Jim ParsonsSheldon Cooper
  • Kaley CuocoPenny
  • Simon HelbergHoward Wolowitz
  • Kunal NayyarRajesh Koothrappali
  • Kevin SussmanStuart Bloom
  • Mark CendrowskiDirector
  • David GoetschWriter

 

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