The Big Bang Theory - Season 4 Episode 4 - The Hot Troll Deviation

Wolowitz (Simon Helberg) realizes that he still has feelings for Bernadette (Melissa Rauch). He forces Penny (Kaley Cuoco) to help him to get another chance. Sheldon (Jim Parsons) and Raj (Kunal Nayyar) are not getting along well at work and are engaged on an all out war. Wolowitz reveals why they broke up. Katee Sackhoff of Battlestar Galactica guest appears with  George Takei of Star Trek.

Channel : CBS
Genre : Comedy
Air date : October 14, 2010