| Person | Type | Job | Role(s) |
|---|---|---|---|
 Betty Sinclair | Crew | Production | Production Manager |
 Clarence Steensen | Crew | Art | Set Decoration |
Don L. Cash | Crew | Costume & Make-Up | Makeup Artist |
Ferde Grofé Sr. | Crew | Sound | Original Music Composer |
Frank Heath | Crew | Crew | Second Unit Cinematographer |
Harry Gerstad | Crew | Editing | Editor |
 Karl Struss | Crew | Camera | Director of Photography |
 Kurt Neumann | Crew | Directing | Director, Producer, Writer |
Lou Asher | Crew | Crew | Property Master |
Mike Matney | Crew | Production | Production Manager |
Orville H. Hampton | Crew | Writing | Dialogue |
Theobold Holsopple | Crew | Art | Production Design |
Tom Lambert | Crew | Sound | Sound Engineer |
 Murray Lerner | Crew | Production | Executive Producer |
Don Stewart | Crew | Crew | Special Effects |
 Barry Norton | Cast | Actor | Reporter (uncredited) |
 Bert Stevens | Cast | Actor | Reporter (uncredited) |
 Cosmo Sardo | Cast | Actor | Reporter (uncredited) |
 Hugh O'Brian | Cast | Actor | Harry Chamberlain |
 James Conaty | Cast | Actor | Doctor Taking Lisa's Blood Pressure (uncredited) |
John Dutra | Cast | Physician | |
 John Emery | Cast | Actor | Dr. Karl Eckstrom |
 Judd Holdren | Cast | Actor | Reporter #3 (uncredited) |
 Kathy Marlowe | Cast | Actress | Reporter |
 Lloyd Bridges | Cast | Actor | Colonel Floyd Graham |
 Morris Ankrum | Cast | Actor | Dr. Ralph Fleming |
 Noah Beery Jr. | Cast | Actor | Major William Corrigan |
 Osa Massen | Cast | Actress | Dr. Lisa Van Horn |
Patrick Aherne | Cast | Actor | Reporter #1 |
 Sam Harris | Cast | Actor | Reporter at Press Briefing (uncredited) |
 Sherry Moreland | Cast | Martian girl | |
 Stuart Holmes | Cast | Actor | Reporter (uncredited) |
Tom Coleman | Cast | Actor | Reporter (uncredited) |
| Person | Type | Job | Role(s) |
