The Big Bang Theory Cast Discusses Season 8 Premiere

CBS has released a new video featuring the cast of The Big Bang Theory discussing tonight's Season 8 premiere.

In the video, the cast members talk about Penny's change of haircut and new job, Sheldon's train trip and the stress on his relationship with Amy, and how Wolowitz is trying to deal with his mother's relationship with Stuart.

Check it out below:

The Big Bang Theory Season 8 premieres with 2 back-to-back episodes tonight, beginning on 8 p.m. ET on CBS.