John Stephenson

Jack Bennett 'Bionic-1' / Klunk (voices)

Jim MacGeorge

Dr. Wilmer Sharp Ph.D. 'Dr. Scarab' (voice)

Carol Bilger

Helen Bennett 'Mother-1' (voice)

Hal Rayle

Eric Bennett 'Sport-1' (voice)

Brian Tochi

Bunjiro "Bunji" Tsukahara 'Karate-1' (voice)

Neil Ross

F.L.U.F.F.I. (voice)

Jennifer Darling

Madame-O (voice)

Frank Welker

Mechanic / Glove / Chopper (voices)

Alan Oppenheimer

Prof. Amadeus Sharp (voice)

Arthur Burghardt

Edward Tully (voice)

Howard Morris

Dr. Hugo Fish (voice)