Aired Wednesday June 19, 5:30pm - 6:00pmon E4

The Big Bang Theory

Series 5 Episode 2: The Infestation Hypothesis

A battle of wills between Sheldon and Penny leaves Amy caught in the middle. Leonard tries to spice up his long-distance relationship with Priya, who has moved back to India.

Original air date
Cast and crew
  • Mark CendrowskiDirector
  • Johnny GaleckiLeonard Hofstadter
  • Jim ParsonsSheldon Cooper
  • Kaley CuocoPenny
  • Simon HelbergHoward Wolowitz
  • Kunal NayyarRaj Koothrappali
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