Special Guest Stars Gary Merrill as Senator Leroy Clark Guest Stars Michael Rennie as Capt. Malcolm Smith Susan Hampshire as Althea Hall Co Starring Lee Meriwether as Dr. Ann MacGregor John Zaremba as Dr. Raymond Swain Whit Bissell as Lt. General Heywood Kirk Wesley Lau as Master Sgt. Jiggs John Winston as The Guard Don Knight as Grainger Frank Parker as Countdown Technician Jean-Michel Michenaud as Marcel
