A British agent's son is kidnapped and held for a ransom of diamonds. The agent finds out that he can't even count on the people he thought were on his side to help him, so he decides to track down the kidnappers himself.
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| 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 |
