Several murders of nuclear scientists, that baffles Scotland Yard, occur in London about the same time that Bill Locklin, a special officer from the United States State Department, arrives to oversee the transfer of Professor Leon Dushenko, a Russian scientist who as fled the U.S.S.R. An attempt is made on Dushenko's life with a monkey's paw-print found at the scene.
| Writing | James Eastwood | Screenplay |
| Directing | Ken Hughes | Director |
| Writing | Ken Hughes | Screenplay |
| Writing | Eric Maschwitz | Story |
| Camera | Josef Ambor | Director of Photography |
| Editing | Geoffrey Muller | Editor |
| Editing | Inman Hunter | Editor |
| Sound | Dick Smith | Sound Supervisor |
| Sound | Dick Smith | Sound Recordist |
| Sound | Sidney Rider | Sound Recordist |
| Camera | Ron Robson | Camera Operator |
| Production | Jim O'Connolly | Production Manager |
| Directing | Fred Ruff | First Assistant Director |
| Directing | John Smith | Second Assistant Director |
| Directing | Betty Parry | Continuity |
| Camera | Bob Penn | Still Photographer |
| Costume & Make-Up | Jack Craig | Makeup Artist |
| Costume & Make-Up | Alice McLaren | Wardrobe Master |
