Ziggy Zerhusen
Reese Paxton
(voice)
Elton Deedle
John Astor
David Morrison
The Doctor
Leonard Nero
Stephens
Ross Ford
Dr. Robert Hoak (swimming double) (uncredited)
Bruno Von Stickle
Ernest Graeber
Kosinsky
Roland Parlay
Stoeffer
Arlen Findletter
Peter Brinker
Col. Gunter Kroll
Emhardt
Anton Granicek
Dr. Otto Hasslein
Dr Charles Forbin
Frederico Caprio
Lt. Franz Von Klemme
Radio Officer
