South Park has no shame. On Wednesday’s season premiere, Trey Parker and Matt Stone took dead aim at the recent batch of deceased, overexposed celebrities — everyone from Michael Jackson to Farrah Fawcett to Billy Mays — and sent viewers rolling on their living room floors (and probably most of the celebs rolling in their graves.) It began with Kyle’s little brother Ike claiming “I see dead celebrities,” continuing with a spoof of “Ghost Hunters” and a wicked parody of “Poltergeist,” in which the Zelda Rubinstein character devises a plan (Walter Cronkite wants to go to the bathroom) to help save Ike. It turns out that the dead are stuck in limbo — they’re on a plane on the purgatory runway and bitching about the delay — because Jackson, who has taken over Ike’s body, refuses to accept he’s dead. The boys come to the rescue… by allowing MJ to live out his fantasy of being accepted as a white, female child. This episode is loaded with storylines. You gotta watch it.