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.
| Directing | Don Siegel | Director |
| Editing | Antony Gibbs | Editor |
| Art | Peter Murton | Art Direction |
| Writing | Clive Egleton | Novel |
| 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 |
| Writing | Leigh Vance | Screenplay |
| Production | Richard D. Zanuck | Executive Producer |
| Production | Don Siegel | Producer |
| Production | Scott Hale | Associate Producer |
| Production | David Brown | Executive Producer |
| Sound | Roy Budd | Original Music Composer |
| Directing | Kip Gowans | Assistant Director |
| Sound | Gerry Humphreys | Sound Recordist |
| Sound | John W. Mitchell | Sound Recordist |
| Sound | Les Wiggins | Sound Editor |
| Directing | Angela Allen | Continuity |
| Costume & Make-Up | Rosemary Burrows | Wardrobe Supervisor |
| Camera | James Devis | Camera Operator |
| Lighting | Nobby Cross | Gaffer |
| Camera | Colin Davidson | Clapper Loader |
| Camera | Dewi Humphreys | Focus Puller |
