George Roubicek

as Cmdr. Praji (Imperial Officer #2 on rebel ship) (uncredited)

as Pvt. Arthur James Gardner

as Astronaut - 2nd American Spacecraft

as Stromberg One Captain

as German Radio Operator

as Sergeant Pilot - Falke's Crew (uncredited)

as Mark

as Lieutenant Berger U.S.N. - C.I.C.

as Policeman #1

as Karkov

as German Submarine Crewman (uncredited)

as Edgar

as Pieter

as Walter Vance

as Grant

as Carter

as KGB Agent (uncredited)

as Bradley

as Daniel

as Semenkin

as Dr. Drew Marshall

as Policeman

as Ludovico

as Eberfield