| Directed by |
Gordon Douglas |
|
| Screenplay by |
George Bruce |
|
| Cast: | ||
| Philip 'Scotty' Grayson | Louis Hayward | |
| Daniel F. O'Hara | Dennis O'Keefe | |
| Dr. Toni Neva | Louise Allbritton | |
| Dr. Ritter von Stolb | Willy Eichberger | |
| Igor Braun | Onslow Stevens | |
| Krebs | Raymond Burr | |
| Dr. Frederick Townsend | Art Baker | |
| Anton Radchek | Philip Van Zandt | |
| Narrator (voice) | Reed Hadley | |
| Ivan | Paul Bryar | |
| G.W. Hunter | John Hamilton | |
| FBI Agent Thompson | Myron Healey | |
| FBI Agent Alison | Jimmy Lloyd | |
| Cop | Lee Phelps | |
| FBI Agent Miller | Keith Richards | |
| Mrs. Ecko, Landlady | Tamara Shayne | |
| Mr. North | Arthur Space | |
| Voice on Tape Recorder | Gale Storm | |
| FBI Chemist | William Tannen | |
| Police Sergeant | Ray Teal | |
| Director of photography |
George Robinson Edward Colman |
|
| Produced by |
Edward Small |
|
| Year: | 1948 | |
| Country: | United States | |
| Language: | English | |