The Big Bang Theory: Season 4, Episode 17

The Toast Derivation

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

Writing:
  • Chuck Lorre
  • Bill Prady
  • Adam Faberman

Stars:
Release Date: 2007-09-24
Seasons: 1 2 3 4 5 6 7 8 9 10 11 12
Metacritic: 8.0/10
TMDb: 7.9/10
  • Country: US
  • Language: English
  • Runtime: 22

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The Cruciferous Vegetable Amplification
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Episode 3 - The Zazzy Substitution
The Hot Troll Deviation
Episode 4 - The Hot Troll Deviation
The Desperation Emanation
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The Irish Pub Formulation
Episode 6 - The Irish Pub Formulation
The Apology Insufficiency
Episode 7 - The Apology Insufficiency
The 21-Second Excitation
Episode 8 - The 21-Second Excitation
The Boyfriend Complexity
Episode 9 - The Boyfriend Complexity
The Alien Parasite Hypothesis
Episode 10 - The Alien Parasite Hypoth...
The Justice League Recombination
Episode 11 - The Justice League Recomb...
The Bus Pants Utilization
Episode 12 - The Bus Pants Utilization
The Love Car Displacement
Episode 13 - The Love Car Displacement
The Thespian Catalyst
Episode 14 - The Thespian Catalyst
The Benefactor Factor
Episode 15 - The Benefactor Factor
The Cohabitation Formulation
Episode 16 - The Cohabitation Formulat...
The Toast Derivation
Episode 17 - The Toast Derivation
The Prestidigitation Approximation
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The Zarnecki Incursion
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The Herb Garden Germination
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The Agreement Dissection
Episode 21 - The Agreement Dissection
The Wildebeest Implementation
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The Engagement Reaction
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The Roommate Transmogrification
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