Martin Sheen

Martin Sheen played the real Seymour Skinner in the episode The Principal and the Pauper.

Guest stars in season 9

Joan Kenley • Martin Sheen • Fyvush Finkel • Joe Namath • Roy Firestone • Mike Judge • Andrea Martin • Jan Hooks • Stephen Jay Gould • Phil Hartman • George Harrison • Patrick Stewart* • Alex Trebek • Jim Varney • James Earl Jones • Jack Ong • Jay Leno • Hank Williams, Jr. • Steven Wright • Janeane Garofalo • Bobcat Goldthwait • Bruce Baum • Helen Hunt • Bob Denver • Rod Steiger • Paul Winfield • U2 (Bono • Adam Clayton • The Edge • Larry Mullen, Jr.) • Steve Martin • Steven Weber • Brendan Fraser