When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she's regrets.
The Big Bang Theory, The Big Bang Theory Season 4
Actor: Jim Parsons, Johnny Galecki, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Mayim Bialik, Melissa Rauch, Kevin Sussman, John Ross Bowie
Quality: HD 720p