The Big Bang Theory

The Toast Derivation

Series 4 - Episode 17 The Toast Derivation



Sheldon decides to make a new set of friends as he is depressed that the group's social world revolves around Leonard rather than himself. Meanwhile, Amy and Bernadette try to persuade Penny to go on a date. Comedy, guest starring LeVar Burton, with Johnny Galecki, Jim Parsons and Mayim Bialik.

Cast & Crew

Leonard Hofstadter Johnny Galecki
Penny Kaley Cuoco
Sheldon Cooper Jim Parsons
Howard Wolowitz Simon Helberg
Raj Koothrappali Kunal Nayyar
Priya Koothrappali Aarti Mann
Amy Farrah Fowler Mayim Bialik
Bernadette Melissa Rauch
Stuart Kevin Sussman
Himself LeVar Burton
Zack Brian Thomas Smith
Barry Kripke John Ross Bowie
Director Mark Cendrowski
Writer Bill Prady
Writer Chuck Lorre
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