Cast
| Name | Character | Team | |
|---|---|---|---|
 |
Harry Townes | Jim Benedict | Unowned |
 |
John Agar | Col. Matthews | Unowned |
 |
Whitney Blake | June | Unowned |
 |
Cecil Kellaway | Dr. A.A. Andrews | Unowned |
 |
Charles Aidman | Dave | Unowned |
 |
Gail Kobe | Kim | Unowned |
 |
Edward Platt | Dr. Easton (as Edward C. Platt) | Unowned |
 |
William Traylor | Space Ship Crew | Unowned |
 |
John Clarke | Space Ship Crew | Unowned |
|
Joel Lawrence | Space Ship Crew | Unowned |
 |
Jon Lormer | Prof. Logan | Unowned |
 |
Robert Cornthwaite | Sen. Royce | Unowned |
 |
Sam Edwards | Technician (uncredited) | Unowned |
 |
Frank Gerstle | Member of Senate Investigating Committee (uncredited) | Unowned |
 |
Biff McGuire | Technician (uncredited) | Unowned |
|
Ed Prentiss | Mr. Duffy (uncredited) | Unowned |
 |
Bert Remsen | Technician (uncredited) | Unowned |