Dave Debusher (2 episodes)
Bishop Thomas Marx (9 episodes)
Stephen Schpelnick
Dr. Zukreski
Dr. Dennis Barkley (1 episode)
Patrick
Peter Madoff (4 episodes)
Commissioner Loeb (6 episodes)
Zimmer the Keymaster (1 episode)
Tad Horvath (15 episodes)
Ray Palmer/The Atom (voice) (1 episode)
Agent Hardigan
Mickey Lamm
Father Mike McGary
Jonathan Parks
Limo Driver / Peter Scolari (voice) (1 episode)
Seminary Teacher (1 episode)
Andrew McKillop (2 episodes)
Billy - Lonely Boy
Ringmaster (1 episode)
Professor Higginson (voice) (1 episode)
Whiskers (voice)
Self - Judge (4 episodes)
Jake Kimball (1 episode)
Kyle Evans (1 episode)
Louis
Parker Reynolds (1 episode)
Edwin Hadley
Doug LeSham (voice) (1 episode)
Pete Conrad (1 episode)
Wayne Szalinski (66 episodes)
Director (5 episodes)
Leslie Tilbert (1 episode)
Brad (voice) (1 episode)
Date #2 (uncredited)
Councilman Kemp (1 episode)
Howard Grant
Troy Chesterfield
Littlechap
Kenyon Stanton (1 episode)
Preston Vogel (voice) (5 episodes)
Charles Hibbard (1 episode)
Tim Albright (1 episode)
Stuart Hofferman (1 episode)
Donald Himmel
Johnny Lake (1 episode)
Wilford Wolf (voice) (1 episode)
Charles Danson
Jonathan Lerner (8 episodes)
Ken Ballantine (38 episodes)
Hamner (voice) (1 episode)
The Shark (voice) (1 episode)
Dr. Zach Drummond
Derek Sanders
Paul DeWitt
Simon Tanner
David Day
Leonard Randall / Delos of Atlantis (1 episode)
Chris Robinson
Paul Kenter (1 episode)
Ted Caton (1 episode)
Michael Harris (142 episodes)
Director (1 episode)
Dr. Jerry Menzies
Phil
Robert Duff
Albie Fervitz (1 episode)
Henry Desmond / Hildegarde (38 episodes)
Douglas Burdett
Benny Loman (13 episodes)
Kookie ("1950's")