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The Big Bang Theory
Season 4 · Episode 17
The Toast Derivation
7.621mFebruary 24, 2011
Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
Episodes
- Episode 1The Robotic Manipulation
- Episode 2The Cruciferous Vegetable Amplification
- Episode 3The Zazzy Substitution
- Episode 4The Hot Troll Deviation
- Episode 5The Desperation Emanation
- Episode 6The Irish Pub Formulation
- Episode 7The Apology Insufficiency
- Episode 8The 21-Second Excitation
- Episode 9The Boyfriend Complexity
- Episode 10The Alien Parasite Hypothesis
- Episode 11The Justice League Recombination
- Episode 12The Bus Pants Utilization
- Episode 13The Love Car Displacement
- Episode 14The Thespian Catalyst
- Episode 15The Benefactor Factor
- Episode 16The Cohabitation Formulation
- Episode 17The Toast Derivation
- Episode 18The Prestidigitation Approximation
- Episode 19The Zarnecki Incursion
- Episode 20The Herb Garden Germination
- Episode 21The Agreement Dissection
- Episode 22The Wildebeest Implementation
- Episode 23The Engagement Reaction
- Episode 24The Roommate Transmogrification