S03E10 The Gorilla Experiment
The Big Bang Theory

calendar_today 2007. Chuck Lorre. Bill Prady.

stars 8.3 Comedy. Romance.

people Johnny Galecki. Jim Parsons. Kaley Cuoco. Simon Helberg.

Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.