John Stephenson

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

Jim MacGeorge

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

Carol Bilger

as Helen Bennett 'Mother-1' (voice)

Hal Rayle

as Eric Bennett 'Sport-1' (voice)

Bobbie Block

as Meg Bennett 'Rock-1' (voice)

Brian Tochi

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

Norman Bernard

as James Dwight "J.D." Corey 'IQ' (voice)

Neil Ross

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