De zoon van een Britse agent wordt ontvoerd en vastgehouden voor losgeld in diamanten. De agent komt erachter dat hij niet eens kan rekenen op de mensen waarvan hij dacht dat ze aan zijn kant stonden om hem te helpen, dus besluit hij zelf de ontvoerders op te sporen.
Nee, helaas is The Black Windmill nog niet beschikbaar op Netflix in Nederland.
| Directing | Don Siegel | Director |
| Writing | Clive Egleton | Novel |
| Editing | Antony Gibbs | Editor |
| Art | Peter Murton | Art Direction |
| Costume & Make-Up | Anthony Mendleson | Costume Design |
| Costume & Make-Up | Freddie Williamson | Makeup Artist |
| Production | Eva Monley | Production Manager |
| Camera | Ousama Rawi | Director of Photography |
| Production | David Brown | Executive Producer |
| Writing | Leigh Vance | Screenplay |
| Directing | Kip Gowans | Assistant Director |
| Production | Scott Hale | Associate Producer |
| Sound | Les Wiggins | Sound Editor |
| Production | Don Siegel | Producer |
| Sound | Gerry Humphreys | Sound Recordist |
| Sound | John W. Mitchell | Sound Recordist |
| Production | Richard D. Zanuck | Executive Producer |
| Sound | Roy Budd | Original Music Composer |
| Camera | Dewi Humphreys | Focus Puller |
| Directing | Angela Allen | Continuity |
| Camera | Colin Davidson | Clapper Loader |
| Lighting | Nobby Cross | Gaffer |
| Costume & Make-Up | Rosemary Burrows | Wardrobe Supervisor |
| Camera | James Devis | Camera Operator |
