Directed by
| Richard Fleischer | ||
Writing Credits
| Calder Willingham | ... | (screenplay) |
| Dale Wasserman | ... | (adaptation) |
| Edison Marshall | ... | (novel) |
Cast (in credits order) verified as complete
| Kirk Douglas | ... | Einar | |
| Tony Curtis | ... | Eric | |
| Ernest Borgnine | ... | Ragnar | |
| Janet Leigh | ... | Morgana | |
| James Donald | ... | Egbert | |
| Alexander Knox | ... | Father Godwin | |
| Maxine Audley | ... | Enid | |
| Frank Thring | ... | Aella | |
 |
Eileen Way | ... | Kitala |
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Edric Connor | ... | Sandpiper |
| Dandy Nichols | ... | Bridget | |
|
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Per Buckhøj | ... | Bjorn |
| Rest of cast listed alphabetically: | |||
| Almut Berg | ... | Pigtails (uncredited) | |
| Peter Capell | ... | Minor Role (uncredited) | |
| Bill Cummings | ... | Viking Warrior (uncredited) | |
| Kelly Curtis | ... | Young Girl (uncredited) | |
| Peter Douglas | ... | Young Boy (uncredited) | |
|
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Georges Guéret | ... | Viking Warrior (uncredited) |
|
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Rico Lopez | ... | Viking Warrior (uncredited) |
| Marco Perrin | ... | Extra (uncredited) | |
| Paul Préboist | ... | Extra (uncredited) | |
| Orson Welles | ... | Narrator (voice) (uncredited) | |
Produced by
| Jerry Bresler | ... | producer |
| Tony Curtis | ... | executive producer (uncredited) |
| Kirk Douglas | ... | executive producer (uncredited) |
| Lee Katz | ... | associate producer (uncredited) |
| Janet Leigh | ... | executive producer (uncredited) |
Music by
| Mario Nascimbene | ||
Cinematography by
| Jack Cardiff | ... | (photographed by) |
Production Design by
| Harper Goff | ||
Makeup Department
| John O'Gorman | ... | makeup artist |
| Gabriella Reggiani | ... | hair stylist |
| Vasco Reggiani | ... | hair stylist |
| Neville Smallwood | ... | makeup artist |
Production Management
| Julien Derode | ... | production manager |
| Lutz Hengst | ... | production manager (uncredited) |
| Bill Kirby | ... | production manager (uncredited) |
| Jacques Plante | ... | production manager (uncredited) |
Second Unit Director or Assistant Director
| André Smagghe | ... | assistant director (as Andre Smagghe) |
| Elmo Williams | ... | second unit director |
Art Department
| Eddie Fowlie | ... | property master (uncredited) |
Sound Department
| Joseph de Bretagne | ... | sound (as Jo de Bretagne) |
| Peter Berling | ... | sound assistant (uncredited) |
| Gordon K. McCallum | ... | sound mixer (uncredited) |
Stunts
| Claude Carliez | ... | fight arranger |
| Ken Buckle | ... | stunts (uncredited) |
| Jack Cooper | ... | stunts (uncredited) |
| Bill Cummings | ... | stunts (uncredited) |
| Henri Guégan | ... | stunt performer (uncredited) |
| Georges Guéret | ... | stunts (uncredited) |
| Eddie Powell | ... | stunts (uncredited) |
| David Sharpe | ... | stunt double: Tony Curtis (uncredited) |
| John Sullivan | ... | stunt double: Kirk Douglas (uncredited) |
Camera and Electrical Department
| Walter Wottitz | ... | photographer: second unit |
| James Devis | ... | focus puller (uncredited) |
| Marc Hyams | ... | clapper loader (uncredited) |
| George Pink | ... | technicolor technician (uncredited) |
Editorial Department
| Elmo Williams | ... | editorial supervisor |
Location Management
| Christian Ferry | ... | location manager (uncredited) |
Music Department
| Franco Ferrara | ... | conductor: orchestra |
| Mario Nascimbene | ... | music arranger |
| Gerard Schurmann | ... | orchestrator (uncredited) |
Script and Continuity Department
| Lucie Lichtig | ... | continuity (uncredited) |
Additional Crew
| Harper Goff | ... | assistant to producer |
| Peter Berling | ... | translator (uncredited) |
| Jack Hirshberg | ... | unit publicist (uncredited) |
| Curd Jürgens | ... | narrator (german version) (uncredited) |
| Yves Montand | ... | narrator (french version) (uncredited) |
| Fred Zendar | ... | boat and water expert (uncredited) |
