'Supernatural' exec: 'Castiel has changed'

Published Jan 16 2012, 14:57 GMT  |  By Morgan Jeffery

Supernatural's executive producer Robert Singer has dropped new hints about the return of Castiel.

Misha Collins confirmed last month that he will reprise his role as the troubled angel on the CW drama.

"It happens by a sure twist of fate," Singer told E! Online. "The Cas that they find is not exactly the Cas that left them."

He also promised that viewers can expect more twists and surprises as the seventh season of Supernatural continues.

"We usually will end [the season] with some sort of a cliffhanger, which will inform the next year," he explained. "Then [the writers] may get into a room and say, 'OK, we've painted ourselves into this corner, now how do we paint ourselves out?'"

Singer added: "There are some surprises in the last few episodes that I think people will be happy with."

Supernatural showrunner Sera Gamble has also confirmed that Jim Beaver will reappear as the late Bobby Singer.

However, Gamble ruled out a return appearance for enigmatic novelist Chuck (Rob Benedict), claiming that the show's writing team "don't currently have anything else for him to do".

Supernatural airs on Fridays at 9/8c on The CW.

> Supernatural: 'Time After Time' recap

Watch a clip from the most recent Supernatural below: