The Big Bang Theory Season 8 Episode 9: The Septum Deviation

The Big Bang Theory is all new tonight!

In tonight's episode, The Septum Deviation, minor surgery for Leonard leads to a major overreaction from Sheldon.

When Leonard gets minor surgery on his nose, Sheldon is the one in need of sympathy when things go awry in the hospital. Meanwhile, Raj's parents' impending divorce causes Howard and Bernadette to work on their own marriage and Howard gets an unpleasant surprise while checking in on Stuart and his mom.

The Big Bang Theory stars Johnny Galecki, Jim Parsons, Kaley Cuoco-Sweeting, Simon Helberg, Kunal Nayyar, Mayim Bialik, and Melissa Rauch. In its eighth season, the series about the misadventures of a group of socially awkward braniacs is one of CBS' number highest rated hit shows.

Tonight's episode will premiere at 8 p.m. E.S.T. on CBS.