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George Peppard as Lt. Bruno Stachel |
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James Mason as General Count von Klugermann |
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Ursula Andress as Countess Kaeti von Klugermann |
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Jeremy Kemp as Willi von Klugermann |
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Karl Michael Vogler as Colonel Otto Heidemann |
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Anton Diffring as Holbach |
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Harry Townes as Kettering |
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Peter Woodthorpe as Rupp |
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Derek Newark as Ziegel |
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Derren Nesbitt as Fabian |
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Loni von Friedl as Elfi Heidemann |
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Friedrich von Ledebur as Feldmarschall von Lenndorf |
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Carl Schell as Manfred Von Richthofen |
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Roger Ostime as The Crown Prince |
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Hugo Schuster as Hans. Elderly Servant |
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Alex Scott as The Orator |
| Directing | John Guillermin | Director |
| Writing | David Pursall | Writer |
| Writing | Gerald Hanley | Writer |
| Writing | Jack Seddon | Writer |
| Costume & Make-Up | Elsa Fennell | Costume Supervisor |
| Costume & Make-Up | Tony Sforzini | Makeup Artist |
| Art | Wilfred Shingleton | Production Design |
| Production | Stuart Lyons | Casting |
| Art | Fred Carter | Art Direction |
| Production | Christian Ferry | Producer |
| Editing | Max Benedict | Editor |
| Costume & Make-Up | Charles E. Parker | Makeup Department Head |
| Costume & Make-Up | John O'Gorman | Makeup Artist |
| Camera | Skeets Kelly | Camera Operator |
| Production | René Dupont | Production Manager |
| Crew | Darby Kennedy | Stunt Coordinator |
| Sound | Chris Greenham | Sound Editor |
| Camera | Chic Waterson | Camera Operator |
| Sound | Jerry Goldsmith | Original Music Composer |
| Camera | Douglas Slocombe | Director of Photography |
| Camera | Mike Fox | Focus Puller |
| Directing | Helen Whitson | Continuity |
| Crew | Karl Baumgartner | Special Effects |
| Costume & Make-Up | Pat McDermott | Hairdresser |
| Camera | Skeets Kelly | Aerial Camera |
| Sound | Claude Hitchcock | Sound |
| Sound | Bob Jones | Sound |
| Costume & Make-Up | Elsa Fennell | Wardrobe Supervisor |
| Art | Tony Curtis | Assistant Art Director |
| Directing | Jack Causey | Assistant Director |
| Directing | Derek Cracknell | Assistant Director |
| Sound | John Cox | Sound |
| Sound | Richard Best Jr. | Assistant Sound Editor |
| Crew | Maurice Ayers | Special Effects |
| Crew | Ron Ballanger | Special Effects |
| Editing | Elizabeth Thoyts | Assistant Editor |