Harold Jensen
Joe Klein
Thomas Bellairs
Orson Stillman Mayor
Jess Parkinson
Charles Sabin
Matt Hays
Saucer Man
The Doctor
Archie
The Mailman
Ship Passenger
Hunter
Cavanaugh
Moore
Dignitary
Stage Performer
E. Lansing Ray - Editor, St. Louis Globe Democrat (uncredited)
Dr. Borg
Company Lawyer (uncredited)
Prof. Ulbrecht Olinger
Simmons
Mr. Brown (uncredited)
George
Mr. Lansing
Mr. Forbes (uncredited)
Count Molda / Joseph Stalin
Dr. Howard Culver
Capt. Arwin
Maigret
Don Morell, Sales