Mala

Agent Ray Mala

Rex

Rex, the Wonder Horse

Mamo Clark

Princess Melani

Herbert Rawlinson

Grant Jackson

William Newell

Hank McGlaurie

John Ward

Anthony Tupper

John Dilson

E.G. Ellsworth

Selmer Jackson

Mr. Canfield

John Picorri

Porotu

George Chesebro

Draker, Island Operations Chief

Bob Kortman

Gang Yacht Capt. Wilson

George Cleveland

Goebel, Gang Scientist

Lloyd Whitlock

Lamar, Headquarters Gang Member [Chs. 1-6]

Tiny Roebuck

Eppa the Wrestler

Roscoe Gerald

Price - Cave Thug in Visor (uncredited)