Petersen hints at 'CSI' movie

Departing 'CSI: Crime Scene Investigation' star William Petersen has hinted he will return for a big screen version of the hit TV drama.

The actor, who will give up his role as forensics expert Gil Grissom on the show during the forthcoming season, admits there have been talks about turning the series into a blockbuster movie for years - and it still might come off.