Ryan Stiles

as Bill (16 episodes)

as Bruce (1 episode)

as Dr. Bowers (1 episode)

as Bill Doty (1 episode)

Producer

as Self (212 episodes), Executive Producer

as Slither (voice)

as Jerry (1 episode)

as Hoot (voice)

as Self (40 episodes)

as Dr. Edwin Gould (1 episode)

as Mr. Moustachio / Burning Robot (voice)

as Himself

as Self (3 episodes)

as Herb (30 episodes)

as Sergeant Clift (1 episode)

as Self

as Self

as Spyro von Madman (voice) (1 episode)

as Vivian

as Self

as Self - Panelist (5 episodes)

as Self (219 episodes)

as Abraham Lincoln (uncredited) (1 episode)