The Big Bang Theory: Season 4 Episode 17: The Toast Derivation
Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Carol Ann Susi
Length: 22 minutes
On Air Date: 28 Jul 2011
The Big Bang Theory: S04E17 Description: Sheldon becomes concerned when everybody begins to hang out at Raj’s apartment and discovers Leonard is the center of the group.