Mark Dana
— Capt. Storm
Diane Brewster
— Sylvia Quentin
Ziva Rodann
— Simira
Alvaro Guillot
— Numar
George N. Neise
— Robert Quentin
Ben Wright
— Walter Andrews
Terence de Marney
— Sgt. Smolett
Richard Peel
— Sgt. Gromley
Guy Prescott
— Dr. Michael Farraday
Kurt Katch
— Hans Brecht
Robert Fortin
— Claude Beauchamp
Ralph Clanton
— Col. Cross