Red Planet Mars

Orley Lindgren

Stewart Cronyn

Walter Sande

Admiral Bill Carey

Willis Bouchey

President

Morris Ankrum

Secretary of Defense Sparks

George Blagoi

Russian Official (uncredited)

Bayard Veiller

Roger Cronyn

Tom Keene

Maj. Gen. George Burdette

Colin Kenny

Mine Owner

House Peters Jr.

Dr. Boulting - Mitchell's Assistant