Hal Smith

as Gyro Gearloose

as Flintheart Glomgold

as Nerdley

as Col. Crumb

as Owl

as Tommy Stubbins

as Goliath

as Mr. Tycoonius

as Coil-Man

as Narrator

as Fair Dinkum and Rinkum Dinkum the Koala Bear brothers

as Texx