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The Big Bang Theory

Series 9 Episode 22: The Fermentation Bifurcation

The gang runs into Penny's old boyfriend at a wine bar as Bernadette spends an evening with Sheldon. Meanwhile, Koothrappali's introduction of his new girlfriend doesn't go as planned.

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