Recurring Guest Characters Lt. General Heywood Kirk 30 guest appearances Dr. Raymond Swain 30 guest appearances Dr. Ann MacGregor 30 guest appearances Jerry 5 guest appearances Master Sgt. Jiggs 4 guest appearances Prof. Anton Biraki 1 guest appearances Capt. Malcolm Smith 1 guest appearances Althea Hall 1 guest appearances Senator Leroy Clark 1 guest appearances Grainger 1 guest appearances Marcel 1 guest appearances The Guard 1 guest appearances Countdown Technician 1 guest appearances Col. Hruda 1 guest appearances General Parker 1 guest appearances Alexis 1 guest appearances McDonnell 1 guest appearances Young Chief 1 guest appearances Capt. Alvarado 1 guest appearances Hernando Cortez 1 guest appearances ⇤ « 1 2 3 4 5 6 7 8 9 » ⇥