The Big Bang Theory

The Toast Derivation

TV-PG
S4 E17    Feb 23, 2011    21m
7.9
Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
Where to Watch The Toast Derivation
Cast of The Toast Derivation
  • Johnny GaleckiLeonard Hofstadter
  • Jim ParsonsSheldon Cooper
  • Kaley CuocoPenny
  • Simon HelbergHoward Wolowitz
  • Kunal NayyarRajesh Koothrappali
  • Melissa RauchBernadette Rostenkowski
  • Mayim BialikAmy Farrah Fowler
  • Kevin SussmanStuart Bloom
  • Aarti MannPriya Koothrappali
  • John Ross BowieBarry Kripke
  • LeVar BurtonLeVar Burton
  • Brian Thomas SmithZack Johnson
 
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