Andy / J. Arthur Crank / Loreli Loverly / Max / Paul the Gorilla / Steve Awesome the $6.39 Man / The Blue Beetle / The Wolfman (780 episodes, 1971-1977)
Count Dracula / Easy Reader / Mad Scientist / Marcello / Mark / Mel Mounds / The Cop (780 episodes, 1971-1977)
Jennifer of the Jungle / Julia Grown-Up / The Witch / Winnie (780 episodes, 1971-1977)
Clam / Fargo North, Decoder / Frankenstein / Jay-Jay / Love of Chair boy / Supper Man (780 episodes, 1971-1977)
Carmela / Millie the Helper / Pandora the Little Girl / The Director (780 episodes, 1971-1977)
Julie - Member of the Short Circus (780 episodes, 1971-1977)
Blond-Haired Cartoon Man (780 episodes, 1971-1977)
Dr. Doolats / Igor / Pedro / Roberto (650 episodes, 1972-1977)
Spell Binder (650 episodes, 1972-1977)
Sylvia / Valerie the Librarian (520 episodes, 1973-1977)
Kathy - Member of the Short Circus (520 episodes, 1971-1975)
Buddy - Member of the Short Circus (520 episodes, 1971-1975)
Spider-Man (390 episodes, 1974-1977)
Brenda / Gladys the Glow-Worm / Madame Rosalie / Vi (260 episodes, 1971-1973)
Hank / Ken Kane / Marko the Magician / The Ice Cream Man / The Milkman (260 episodes, 1971-1973)
Dwayne - Member of the Short Circus (260 episodes, 1973-1975)
Jesse - Member of the Short Circus (260 episodes, 1975-1977)
Zack - Member of the Short Circus (260 episodes, 1971-1973)
Kelly - Member of the Short Circus (260 episodes, 1973-1975)
Charlie - Member of the Short Circus (260 episodes, 1975-1977)
Samantha - Member of the Short Circus (260 episodes, 1975-1977)
Gail - Member of the Short Circus (260 episodes, 1975-1977)
Iris - Member of the Short Circus (130 episodes, 1971-1972)
Allison - Member of the Short Circus (130 episodes, 1972-1973)
Announcer (130 episodes, 1971-1972)
Road Runner (5 episodes, 1974-1976)
Self / Lester (4 episodes, 1972-1973)
Self (3 episodes, 1972-1973)
Self / Ernestine the Operator (3 episodes, 1972)
Wile E. Coyote (3 episodes, 1974-1976)
Big Bird / Oscar the Grouch (2 episodes, 1972-1975)
Self (2 episodes, 1972-1973)
Self (2 episodes, 1972)
Self (1 episode, 1972)
Self (1 episode, 1973)
Grover (1 episode, 1975)
6.6 (1 episode, 1976)