The episode: 'Treehouse of Horror V' The role: Al Gore as Al Gore Al Gore was approached to host "Treehouse of Horror V" but he declined, which might well have had something to do with damaging his political career or anything. But this particular story is more about what came next anyway: karma. Years after rejecting the show, Gore, then approached the show in 2000 requesting a special guest spot. The writers, probably with a overwhelming sense of satisfaction, took their opportunity to reject him back. The ex-Vice President has appeared numerous times on Matt Groening's Futurama show but that's hardly the same thing is it? It isn't uncommon for ex-political powers to reject the show. To date no ex-president has appeared on the show, but that isn't through a lack of trying: Ronald Reagan, Richard Nixon, George H. W. Bush, Jimmy Carter and Gerald Ford were all invited to appear on the show and Reagan was the only one who replied - albeit with a no.