Colonel Floyd Graham
Dr. Lisa Van Horn
Dr. Karl Eckstrom
Major William Corrigan
Harry Chamberlain
Dr. Ralph Fleming
Reporter #1
Martian girl
Physician
Reporter
Reporter (uncredited)
Doctor Taking Lisa's Blood Pressure (uncredited)
Reporter at Press Briefing (uncredited)
Reporter #3 (uncredited)
Reporter (uncredited)
Reporter (uncredited)
Reporter (uncredited)
Reporter (uncredited)