The Big Bang Theory

The Toast Derivation (Season 4, Episode 17)

TV-PG

TV Episode | 22 min | Comedy, Romance

Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.

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Cast	+ Add Cast
12 cast members

Name	Known for
Johnny Galecki Leonard Hofstadter Leonard Hofstadter See fewer	The Big Bang Theory (2007)
Jim Parsons Sheldon Cooper Sheldon Cooper See fewer	The Big Bang Theory (2007)
Kaley Cuoco Penny Penny See fewer	The Big Bang Theory (2007)
Simon Helberg Howard Wolowitz Howard Wolowitz See fewer	Florence Foster Jenkins (2016)
Kunal Nayyar Raj Koothrappali Raj Koothrappali See fewer	The Big Bang Theory (2007)
Mayim Bialik Amy Farrah Fowler Amy Farrah Fowler See fewer	Beaches (1988)
Melissa Rauch Bernadette Rostenkowski Bernadette Rostenkowski See fewer	The Big Bang Theory (2007)
LeVar Burton LeVar Burton LeVar Burton See fewer	Star Trek: Generations (1994)
Kevin Sussman Stuart Bloom Stuart Bloom See fewer	Burn After Reading (2008)
Brian Thomas Smith Zack Johnson Zack Johnson See fewer	The Big Bang Theory (2007)
John Ross Bowie Barry Kripke Barry Kripke See fewer	Speechless (2016)
Aarti Mann Priya Koothrappali Priya Koothrappali See fewer	The Recruit (2022)