The Big Bang Theory: Season 4 Episode 16: The Cohabitation Formulation
Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Carol Ann Susi
Length: 21 minutes
On Air Date: 21 Jul 2011
The Big Bang Theory: S04E16 Description: Bernadette makes Howard choose between herself and his mother, while Penny and Raj become upset when Priya returns to town and resumes her relationship with Leonard.