Watch S4, EP17: The Toast Derivation with Fubo for $0 Today
Sheldon is upset when he realizes Leonard is the center of their group of friends.
Sheldon is upset when he realizes Leonard is the center of their group of friends.
How to watch
More episodes
The Big Bang Theory
S2, EP8 "The Lizard-Spock Expansion"Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
The Big Bang Theory
S2, EP9 "The White Asparagus Triangulation"Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
The Big Bang Theory
S2, EP10 "The Vartabedian Conundrum"Leonard asks Penny for advice when his new relationship starts moving too fast.
The Big Bang Theory
S2, EP12 "The Killer Robot Instability"When Penny's comment about Wolowitz's love life sends him into a depressed stupor, his friends lose their most important teammate in an upcoming fighting-robot competition.
The Big Bang Theory
S4, EP18 "The Prestidigitation Approximation"Leonard has to choose between Penny and his new girlfriend, Priya; Howard's magic trick drives Sheldon crazy.
The Big Bang Theory
S4, EP17 "The Toast Derivation"Sheldon is upset when he realizes Leonard is the center of their group of friends.
The Big Bang Theory
S4, EP16 "The Cohabitation Formulation"Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.
The Big Bang Theory
S4, EP15 "The Benefactor Factor"A wealthy donor makes Leonard question what he is willing to do for science.
