The Toast Derivation

Feb 24, 2011 on CBS at 8:00 PM


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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The Cohabitation Formulation
Season 4 Episode 16

Feb 17, 2011

Next episode

The Prestidigitation Approximation
Season 4 Episode 18

Mar 10, 2011

Guest stars

LeVar Burton