Diễn viên
Whitney Blake
June
Sam Edwards
Technician (uncredited)
Harry Townes
Jim Benedict
John Agar
Col. Matthews
Cecil Kellaway
Dr. A.A. Andrews
Edward Platt
Dr. Easton
William Traylor
Space Ship Crew
Robert Cornthwaite
Sen. Royce
Frank Gerstle
Member of Senate Investigating Committee (uncredited)
Charles Aidman
Dave
Gail Kobe
Kim
Biff McGuire
Technician (uncredited)
Bert Remsen
Technician (uncredited)
Jon Lormer
Prof. Logan