The Big Bang Theory - Season 4 (2010)

You are currently watching The Big Bang Theory - Season 4 2010 now, stars are : Kaley Cuoco, Johnny Galecki, Jim Parsons.The fourth season of the American sitcom The Big Bang Theory, began airing on CBS on September 23, 2010. Season four started four months after the end of season 3. Melissa Rauch and Mayim Bialik were upgraded to the main cast during the fourth season as Dr. Bernadette Rostenkowski and Dr. Amy Farrah Fowler.