Michael Therriault

as Self

as Dr. Doheny

as Fred Treband (2 episodes)

as Targ Reinhard (1 episode)

as Gill

as Mr. Cross (2 episodes), as Nathan Cross (4 episodes), as Spence (4 episodes), as Spencer Rhodes (2 episodes)

as Daniel

as Gordie Shaw (7 episodes)

as Dr. Foley

as Mr. McDonald (1 episode)

as Old Man Jenkinsbot / Mayor Torgo (voice) (52 episodes)

as Blake Creighton (1 episode)

as Nigel Sweeney (1 episode)

as Skip Hadderly (7 episodes)

as Dr. Mickelson

as Patrick (5 episodes)

as Richard Schwenkman (7 episodes)

as Elia Kazan

as Simon Muraayn (1 episode)

as Harrison (1 episode)

as Trip's Assistant

as Lord Castleroy (1 episode)

as Anatomy Professor

as Bruce Johns