The terrible and trecherous Pendragon plans to gain the throne of Cornwall by getting the king to abdicate and to marry his lovely daughter. To help him he has his dreadful witches in his castle and his almost unstoppable sorcery. A giant under his control abducts the princess, but on the way home with her the giant meets farming lad Jack who slays him. This is only the beginning.
Unfortunately the movie Jack the Giant Killer is not yet available on HBO Max.
| Writing | Orville H. Hampton | Screenplay |
| Writing | Nathan Juran | Screenplay |
| Directing | Nathan Juran | Director |
| Writing | Orville H. Hampton | Story |
| Costume & Make-Up | Frank McCoy | Makeup Artist |
| Visual Effects | Tim Baar | Visual Effects |
| Visual Effects | Lloyd Vaughan | Animation |
| Sound | Bert Shefter | Original Music Composer |
| Crew | Augie Lohman | Special Effects |
| Camera | David S. Horsley | Director of Photography |
| Editing | Grant Whytock | Editor |
| Costume & Make-Up | Dave Berman | Costume Design |
| Visual Effects | Wah Chang | Visual Effects |
| Production | Robert E. Kent | Associate Producer |
| Art | Fernando Carrere | Art Direction |
| Visual Effects | Howard A. Anderson | Visual Effects |
| Art | Edward G. Boyle | Set Decoration |
| Costume & Make-Up | Louise Miehle | Hairstylist |
| Production | Ben Hersh | Production Supervisor |
| Production | Ralph E. Black | Unit Production Manager |
| Production | Edward Small | Producer |
| Costume & Make-Up | Charles Gemora | Makeup Artist |
| Sound | Paul Sawtell | Original Music Composer |
| Visual Effects | Gene Warren | Visual Effects |
| Visual Effects | Bill Brace | Matte Painter |
| Visual Effects | Tom Holland | Visual Effects |
| Visual Effects | Phil Kellison | Visual Effects |
| Visual Effects | Jim Danforth | Visual Effects |
| Visual Effects | David Pal | Visual Effects |
