This movie debut for saucy British TV comic Benny Hill has Benny leaving his job as a sweeper after winning some money. He becomes a private detective and investigates a plot to assassinate British scientists.
Is Who Done It? on Netflix? Yes! The movie Who Done It? is now on Netflix in the countries listed below.
| Writing | T. E. B. Clarke | Screenplay |
| Directing | Basil Dearden | Director |
| Production | Basil Dearden | Co-Producer |
| Directing | David Tringham | Third Assistant Director |
| Production | Michael Relph | Producer |
| Crew | E.R. Taylor | Special Effects |
| Production | Michael Balcon | Executive Producer |
| Crew | W. Simpson Robinson | Scenic Artist |
| Sound | Stephen Dalby | Sound Supervisor |
| Directing | Jean Graham | Continuity |
| Sound | Dock Mathieson | Conductor |
| Costume & Make-Up | Harry Frampton | Makeup Artist |
| Camera | Chic Waterson | Camera Operator |
| Sound | Alastair McIntyre | Sound Editor |
| Editing | Peter Tanner | Editor |
| Costume & Make-Up | Daphne Martin | Hairstylist |
| Sound | Philip Green | Original Music Composer |
| Production | Hal Mason | Production Supervisor |
| Art | Jim Morahan | Art Direction |
| Sound | Leo Wilkins | Sound Recordist |
| Camera | Otto Heller | Director of Photography |
| Costume & Make-Up | Anthony Mendleson | Costume Design |
| Production | David Peers | Unit Production Manager |
| Directing | Tom Pevsner | Assistant Director |
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