Details
- Season
- Season 4
- Episode
- S04xE17
- Air Date
- 24 February 2011
- Where to watch
Overview
The Big Bang Theory season 4, episode 17 — “The Toast Derivation” (S04xE17) first aired on 24 February 2011.
Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.