Einar, brutal son of Ragnar and future heir to his throne, tangles with Eric, a wily slave, for the hand of a beautiful English maiden.
| Writing | Calder Willingham | Screenplay |
| Directing | Richard Fleischer | Director |
| Camera | Jack Cardiff | Director of Photography |
| Writing | Dale Wasserman | Adaptation |
| Writing | Edison Marshall | Novel |
| Production | Bill Kirby | Production Manager |
| Editing | Elmo Williams | Supervising Editor |
| Sound | Mario Nascimbene | Original Music Composer |
| Sound | Mario Nascimbene | Music Arranger |
| Production | Jerry Bresler | Producer |
| Costume & Make-Up | Gabriella Reggiani | Hairdresser |
| Sound | Franco Ferrara | Conductor |
| Costume & Make-Up | Neville Smallwood | Makeup Artist |
| Sound | Joseph de Bretagne | Sound |
| Production | Julien Derode | Production Manager |
| Production | Harper Goff | Producer's Assistant |
| Directing | André Smagghe | Assistant Director |
| Art | Harper Goff | Production Design |
| Directing | Elmo Williams | Second Unit Director |
| Costume & Make-Up | John O'Gorman | Makeup Artist |
| Costume & Make-Up | Vasco Reggiani | Hairdresser |
| Camera | Walter Wottitz | Second Unit Director of Photography |
