As the first nomadic tribes wander across the vast wilderness of the infant planet they confront hostilities created by the harsh environment and each other. After a massive volcanic eruption a tribal chief is killed and his two sons fight for supremacy, not only for the leadership of the tribe but also for the love of a beautiful young woman. The age-old battlegrounds of rivalry, envy and passion are explored in this tale of prehistoric adventure.
Unfortunately the movie Creatures the World Forgot is not yet available on HBO Max.
| Directing | Don Chaffey | Director |
| Writing | Michael Carreras | Writer |
| Production | Michael Carreras | Producer |
| Sound | Mario Nascimbene | Original Music Composer |
| Camera | Vincent G. Cox | Director of Photography |
| Editing | Chris Barnes | Editor |
| Production | James Liggat | Casting |
| Art | John Stoll | Production Design |
| Costume & Make-Up | Jeanette Freeman | Hair Supervisor |
| Costume & Make-Up | Bill Lodge | Makeup Supervisor |
| Costume & Make-Up | Colin Garde | Makeup Artist |
| Production | Jack Martin | Production Manager |
| Directing | Ferdinand Fairfax | First Assistant Director |
| Directing | Simon Peterson | Second Assistant Director |
| Art | Josie MacAvin | Assistant Art Director |
| Sound | Roy Hyde | Sound Editor |
| Sound | Terry Poulton | Sound Editor |
| Sound | John Streeter | Sound Recordist |
| Sound | Graham V. Hartstone | Sound Re-Recording Mixer |
| Crew | Frank Hayden | Stunts |
| Crew | Bronco McLoughlin | Stunts |
| Camera | Urnee Robinson | Camera Operator |
| Sound | Philip Martell | Music Supervisor |
| Directing | Lorette Walder | Continuity |
