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The Big Bang Theory

Series 12 Episode 15: The Donation Oscillation

Penny tries to throw a wrench into Leonard's plan to be a sperm donor for her ex-boyfriend. Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip aboard the vomit comet.

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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