The creator of Supernatural has billed season five as "the war everyone's been waiting for."

What does that mean for Jim Beaver's character of Bobby?

A major twist, the actor told E! News. He said:

"There's something pretty big that happens with Bobby in the first episodes. Really big. It's going to have a huge impact on his relationship with the boys—but I don't know what that impact is, because I've only seen the first three scripts."

Supernatural returns for season five on September 10. It will follow the series premiere of The Vampire Diaries.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.