John Loder and Elliot Makeham star in Redd Davis’s British topical crime thriller. Professor Grayson is working on an anti-gas experiment and Dr. Klee, whose quiet advertising covers other welfares, means to find it.
| Directing | Redd Davis | Director |
| Sound | Percival Mackey | Music Director |
| Camera | Geoffrey Faithfull | Director of Photography |
| Sound | Hal Fuller | Sound Recordist |
| Editing | Cecil H. Williamson | Editor |
| Directing | Arthur Barnes | Assistant Director |
| Writing | E. Hayter Preston | Writer |
| Art | R. Holmes Paul | Art Direction |