The folks at CSI may want to prepare a slab for William Petersen's Gil Grissom. In the current issue of Playboy, the actor hints that his days of starring on TV's No. 1 show may be numbered. "We're just finishing our 81st episode — that's a lot," he says. "I'll do CSI until I legally don't have to do it anymore, which I think is at the end of next year. Right now, that's as long as I can foresee doing this show." Sounds like someone wants a raise.