Trailer
Images
 | Charles Quigley as Duncan Richards |
 | Linda Stirling as Diana Farnsworth |
 | Clayton Moore as Louis Ashe |
 | I. Stanford Jolley as Dr. Blackton [Ch. 11] |
 | Kenne Duncan as Dr. Chambers [Chs. 1-2, 8] |
 | Forrest Taylor as Prof. Van Wyck |
 | Emmett Vogan as Anderson [Chs. 1-4] |
 | Sam Flint as Maxwell |
 | Joseph Forte as Prof. Parker (as Joe Forte) |
 | Stanley Price as Count Fator [Chs. 11-12] |
 | Wheaton Chambers as Wilson [Ch. 1] |
 | Tom Steele as Henchman Stricker [Chs. 4, 7, 9] |
 | Dale Van Sickel as Henchman Harte [Chs. 6-7] |
 | Rex Lease as Bain |
 | Fred Graham as Snyder [Chs. 1-2] / Zane [Ch. 8] |
| Bud Wolfe as Cross - Apartment Thug [Chs. 11-12] |
| Crew | |
| Polly Burson | Stunt Double |
Directing | |
| Fred C. Brannon | Director |
| William Witney | Director |
Writing | |
| Albert DeMond | Screenplay |
| Basil Dickey | Screenplay |
| Jesse Duffy | Screenplay |
| Sol Shor | Screenplay |
Camera | |
| Bud Thackery | Director of Photography |
Sound | |
| Mort Glickman | Original Music Composer |
Production | |
| Ronald Davidson | Associate Producer |
Editing | |
| Cliff Bell Sr. | Editor |
| Harold Minter | Editor |
Art | |
| Fred A. Ritter | Art Direction |
| John McCarthy Jr. | Set Decoration |
| Earl Wooden | Set Decoration |
Sound | |
| William E. Clark | Sound |
Crew | |
| Howard Lydecker | Special Effects |
| Theodore Lydecker | Special Effects |
