Ergens in de 10de eeuw, zien twee broertjes, Erik en Eron, hoe hun ouders worden vermoord door de Engelsen. Erik wordt meegenomen en opgevoed door Koningin Anne, terwijl Eron opgroeit in eenzaamheid. Jaren later, wanneer de Vikingen een aanval beramen op Engeland komen ze elkaar weer tegen, Eron als Viking en Erik als officier.
Nee, helaas is Gli invasori nog niet beschikbaar op Netflix in Nederland.
| 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 |
