Guest Stars Joseph Cotten as Colonel Heinrich Pamela Austin as Corey Levin Co Starring Than Wyenn as Hans Schiller Dennis McCarthy as 2nd U.S. Doctor Mario Alcalde as Hardtman Georg Stanford Brown as Bates John Hoyt as Mundt Erik Holland as Schneider Robert Boon as German Doctor James Flavin as General Levin Willi Koopman as Heide Frank DeKova as General Tashkov