Two actors, actually (don't forget Peggy).
Anyway, this guy was great as Charlie. I think it's awesome to see him on the show, he's always fun to watch.
As far as the weird X-files reference, FlashForward and Lost are everything that X-files was not. X-files teased its audience with the promise of this huge meta-story that had actually never even been written. Today's better sci-fi learned valuable lessons from how cheated most X-files fans were when the show just petered out and never went anywhere.
Uh oh. I just realized I've turned into to one of those guys who argue over the internet about sci-fi TV shows. Guess I'll be seeing you all at the next ComiCon...