Aired Friday September 17, 6:30pm - 7:00pmon E4 +1
The Big Bang TheorySeries 7 Episode 7: The Proton Displacement
The Proton Displacement When Professor Proton contacts Leonard instead of Sheldon for help, Sheldon turns to another TV scientist, Bill Nye. Also, Raj gets jealous when Howard crashes a girls' night.
- Original air date
Cast and crew