Variety announced a major shakeup Tuesday afternoon for Showtime's runaway hit series Dexter. The serial killer drama's executive producer and "showrunner" (read: dude in charge) Daniel Cerone has flown the coop, opting for a similar position on ABC's Dirty Sexy Money.Cerone has been the top man on Dexter since the show's beginning in 2006, following a run as a writer-producer on Charmed. Despite Cerone's departure, Dexter is still on track to kick off it's third season on September 30. Assuming that the writers strike put a crimp in its development, it's safe to guess that the season is still being scripted. No word on what impact, if any, Cerone's absence will have on the creative direction.