These stars guested on the show, in appearance order:

Seth Green, Dwight Schultz, Ryan Stiles, Patrick Cronin, Emma Caulfield, Peter Spellos, Ted Lange, Ian Patrick Williams (twice), Abe Vigoda, John O'Hurley, Krista Allen, Kevin Michael Richardson (twice), Adam West, Denise Richards, and also Adrienne Barbeau, Michael Buffer, King Kong Bundy, Bruce Campbell, and Richard Moll.