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 Whit Bissell as Lt. General Heywood Kirk John Zaremba as Dr. Raymond Swain Wesley Lau as Master Sgt. Jiggs John Winston as The Guard Jean-Michel Michenaud as Marcel Frank Parker as Countdown Technician Don Knight as Grainger
