Directed by
| Riccardo Freda | ||
Writing Credits (in alphabetical order)
| Filippo Sanjust | ||
| Adolphe d'Ennery | ... | (novel) |
Cast (in credits order) complete, awaiting verification
| Brett Halsey | ... | Don Carlos de Bazan | |
| Béatrice Altariba | ... | Isabella | |
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Giulio Bosetti | ... | Duke of Saavedra |
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Gabriele Antonini | ... | Phillip II |
| Gabriele Tinti | ... | Corvo | |
| Mario Scaccia | ... | Il Cardinale | |
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Alberto Sorrentino | ... | Sancho |
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Jacopo Tecchi | ... | Intendente |
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Anita Todesco | ... | Caterina |
| Rest of cast listed alphabetically: | |||
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Gary Conklin | ... | (uncredited) |
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Antonio Corevi | ... | A Conspirator (uncredited) |
| John Karlsen | ... | The Old Actor (uncredited) | |
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Jacques Stany | ... | Officer at Don Carlos Execution (uncredited) |
Produced by
| Cino Del Duca | ... | producer |
Music by
| Franco Mannino | ||
Cinematography by
| Raffaele Masciocchi | ||
Production Design by
| Antonio Martini | ||
Set Decoration by
| Antonio Martini | ||
Second Unit Director or Assistant Director
| Marcello Avallone | ... | assistant director |
Special Effects by
| Eros Bacciucchi | ... | special effects |
Stunts
| Mauro Mannatrizio | ... | stunts (uncredited) |
| Giancarlo Ukmar | ... | stunts (uncredited) |
Additional Crew
| Cesare Barbetti | ... | voice dubbing: Gabriele Tinti (uncredited) |
| Gianfranco Bellini | ... | voice dubbing: Jacopo Techi (uncredited) |
| Emilio Cigoli | ... | voice dubbing: Brett Halsey (uncredited) |
| Maria Pia Di Meo | ... | voice dubbing: Béatrice Altariba (uncredited) |
| Nando Gazzolo | ... | voice dubbing: John Karlsen (uncredited) |
| Oreste Lionello | ... | voice dubbing: Alberto Sorrentino (uncredited) |
| Pino Locchi | ... | voice dubbing (uncredited) |
| Massimo Turci | ... | voice dubbing: Gabriele Antonini (uncredited) |