The Big Bang Theory 2007

- Season 9 Episode 2 - The Separation Oscillation

Synopsis: The Separation Oscillation: Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny’s mind at ease. Also, Sheldon films a special episode of “Fun with Flags” after his breakup with Amy, and Bernadette feels guilty about withholding a secret from Penny.
Aired: Sep 28, 2015