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Laurence Harvey as Sean McKenna |
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Sarah Miles as Catherine |
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Robert Walker Jr. as Dominic |
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John Ireland as Prison Warden |
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Ross Martin as Le Caq |
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Lee Patterson as Nicky |
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Jack MacGowran as O'Brian |
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Carlos Casaravilla as Ramades |
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Fernando Rey as Sanchez |
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Fernando Sancho as Shaoush |
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Noel Purcell as Finigan |
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José Nieto as Inspector |
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Phil Posner as Prison Official |
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Rafael Albaicín as Gendarme |
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James Brown as Gendarme |
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Murray Melvin as Gendarme |
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Carlos Chemenal as Gendarme |
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Enrique Closas as Gendarme |
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Juan García Delgado as Gendarme |
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José Manuel Martín as Gendarme |
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Ricardo Rodríguez as Gendarme |
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Juan Olaguibel as Gendarme |
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Manuel Pêra as Gendarme |
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Francisco Montalvo as Guard |
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José Riesgo as Guard |
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Barta Barri as Death House Guard |
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José Guardiola as Gate Guard |
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Edward St. John as Special Guard |
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Jose Trinidad as Police Chauffeur |
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Eduardo García as Truck Driver |
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Robert Rietti as Sanchez / Chief Warden |
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Xan das Bolas as |
| Directing | Laurence Harvey | Director |
| Writing | Ben Barzman | Screenplay |
| Writing | Frédéric Grendel | Novel |
| Sound | Gerard Schurmann | Original Music Composer |
| Costume & Make-Up | George Frost | Makeup Supervisor |
| Art | Ramiro Gómez | Art Direction |
| Directing | Margarita Pardo | Continuity |
| Crew | Manuel Baquero | Special Effects |
| Costume & Make-Up | Betty Glasow | Hairdresser |
| Production | Jesús García Gárgoles | Production Manager |
| Camera | Brian West | Camera Operator |
| Production | Alan Kaplan | Producer's Assistant |
| Production | David Middlemas | Production Supervisor |
| Sound | Brendan Redmond | Sound Mixer |
| Crew | Arthur Beavis | Special Effects |
| Sound | Gerard Schurmann | Conductor |
| Camera | Oswald Morris | Director of Photography |
| Directing | John Quested | Assistant Director |
| Crew | Laurence Harvey | Additional Dialogue |
| Directing | Pedro Vidal | Assistant Director |
| Costume & Make-Up | Moss Mabry | Costume Consultant |
| Production | Laurence Harvey | Producer |
| Sound | Carlo Martelli | Original Music Composer |
| Editing | Ralph Kemplen | Editor |
| Sound | Janet Davidson | Sound Editor |
| Crew | Alun Falconer | Additional Dialogue |
| Sound | Gordon Davie | Assistant Sound Editor |
