Unknown to everyone but his shady Middle Eastern bosses, watchmaker Hawkins is actually a professional hired assassin with a predilection for killing his targets with bombs. After disposing of a dictator and millionaire, Hawkins is assigned to kill a politician who is heading to a remote hotel, The Green Man, for a secret tryst with his secretary. There, however, Hawkins' plot is discovered by vacuum salesman William Blake, who determines to stop him.
| Directing | Robert Day | Director |
| Camera | Gerald Gibbs | Director of Photography |
| Art | Wilfred Shingleton | Art Direction |
| Editing | Bernard Gribble | Editor |
| Production | John Pellatt | Unit Manager |
| Directing | Douglas Hermes | Assistant Director |
| Camera | Alan Hume | Camera Operator |
| Sound | John Cox | Sound Supervisor |
| Sound | Buster Ambler | Sound Recordist |
| Sound | Red Law | Sound Recordist |
| Costume & Make-Up | Anna Duse | Costume Designer |
| Directing | Olga Brook | Continuity |
| Costume & Make-Up | Trevor Crole-Rees | Makeup Artist |
| Costume & Make-Up | Bill Griffiths | Hairdresser |
| Crew | Wally Veevers | Special Effects |
| Crew | George Samuels | Special Effects |
| Writing | Sidney Gilliat | Screenplay |
| Writing | Frank Launder | Screenplay |
| Sound | Cedric Thorpe Davie | Original Music Composer |
| Sound | Muir Mathieson | Conductor |
| Production | Leslie Gilliat | Associate Producer |
| Crew | Basil Mannin | Scenic Artist |
| Sound | Ken Ritchie | Boom Operator |
| Production | Frank Launder | Producer |
| Production | Sidney Gilliat | Producer |
| Sound | John Glen | Sound Editor |
| Writing | Frank Launder | Theatre Play |
| Writing | Sidney Gilliat | Theatre Play |
| Directing | Basil Dearden | Director |
