| The Big Bang Theory - S04E16 - The Cohabitation Formulation.avi|
Plot Summary: As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.
Release Date: 2011-02-17
Directors: Chuck Lorre,Bill Prady
Writers: Chuck Lorre,Bill Prady
Starcast: Johnny Galecki,Jim Parsons,Kaley Cuoco