• 
  Morgan Freeman

  Mark / Easy Reader / Mel Mounds
• 
  Rita Moreno

  Carmela / Pandora
• 
  Denise Nickerson

  Allison
• 
  Mel Brooks

  Blond-Haired Cartoon Man
• 
  June Angela

   Julie - Member of the Short Circus (780 episodes, 1971-1977)
• 
  Luis Avalos

  Dr. Doolats
• 
  Judy Graubart

  Jennifer of the Jungle
• 
  Steve Gustafson

   Buddy - Member of the Short Circus (520 episodes, 1971-1975)

• 
  Melanie Henderson

   Kathy - Member of the Short Circus (520 episodes, 1971-1975)
• 
  Skip Hinnant

  Clam
• 
  Zero Mostel

  Spell Binder
• 
  Danny Seagren

  Spider-Man
• 
  Hattie Winston

  Sylvia
• 
  Jim Boyd

  Andy

• 
  Giancarlo Esposito

  Echipa