Gerald Mohr

Col. Thomas O`Bannion

Naura Hayden

Dr. Iris Ryan

Les Tremayne

Prof. Theodore Gettell

Jack Kruschen

CWO Sam Jacobs

Paul Hahn

Maj. Gen. George Treeger

J. Edward McKinley

Prof. Paul Weiner

Tom Daly

Dr. Frank Gordon

Don Lamond

TV Newscaster / Narrator / Martian (voice)

Edward Innes

Brig. Gen. Alan Prescott

Gordon Barnes

Maj. Lyman Ross

Jack Haddock

Lt. Col. Davis

Brandy Bryan

Nurse Hayes

Joan Fitzpatrick

Nurse Dixon

Duke Norton

Dr. Muller

William Remick

Dr. Hawley