In the 9th Century, two Viking children, separated since their early childhood with one raised by the British and the other by Vikings, meet after nearly 20 years as rivals as war breaks out between Britian and the Vikings for control of England.
Unfortunately the movie Erik the Conqueror is not yet available on HBO Max.
| Directing | Mario Bava | Director |
| Writing | Oreste Biancoli | Story |
| Writing | Piero Pierotti | Story |
| Writing | Mario Bava | Story |
| Editing | Lina Caterini | Assistant Editor |
| Production | Paolo Mercuri | Unit Manager |
| Production | Armando Govoni | Unit Manager |
| Production | Arturo Padovani | Production Secretary |
| Production | Dante Brini | Administration |
| Directing | Franco Prosperi | First Assistant Director |
| Directing | Tonino Ricci | Second Assistant Director |
| Camera | Enrico Fontana | Assistant Camera |
| Camera | Giuseppe Berta | Assistant Camera |
| Directing | Anita Borgiotti | Script Supervisor |
| Art | Massimo Tavazzi | Set Decoration |
| Sound | Roberto Mattioli | Sound |
| Sound | Tonino Cacciottolo | Foley Artist |
| Sound | Pietro Vesperini | Sound Recordist |
| Costume & Make-Up | Mario Giorsi | Costume Design |
| Costume & Make-Up | Tina Grani | Costume Design |
| Art | Giorgio Giovannini | Production Design |
| Sound | Luigi Urbini | Conductor |
| Production | Lionello Santi | Producer |
| Camera | Mario Bava | Director of Photography |
| Sound | Roberto Nicolosi | Original Music Composer |
| Editing | Mario Serandrei | Editor |
| Writing | Oreste Biancoli | Screenplay |
| Writing | Piero Pierotti | Screenplay |
| Writing | Mario Bava | Screenplay |
| Costume & Make-Up | Mara Rocchetti | Hairstylist |
| Costume & Make-Up | Euclide Santoli | Makeup Artist |
| Production | Massimo De Rita | Production Manager |
| Crew | Leopoldo Savona | Choreographer |
| Camera | Giovanni Narzisi | Camera Operator |
| Camera | Ubaldo Terzano | Camera Operator |
| Sound | Aldo Zanni | Boom Operator |
