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 | Nathan Juran | Screenplay |
| Writing | Orville H. Hampton | Story |
| Directing | Nathan Juran | Director |
| Writing | Orville H. Hampton | Screenplay |
| Editing | Grant Whytock | Editor |
| Costume & Make-Up | Dave Berman | Costume Design |
| Visual Effects | Howard A. Anderson | Visual Effects |
| Costume & Make-Up | Louise Miehle | Hairstylist |
| Crew | Augie Lohman | Special Effects |
| Visual Effects | Gene Warren | Visual Effects |
| Art | Fernando Carrere | Art Direction |
| Production | Edward Small | Producer |
| Production | Ralph E. Black | Unit Production Manager |
| Production | Robert E. Kent | Associate Producer |
| Sound | Bert Shefter | Original Music Composer |
| Costume & Make-Up | Frank McCoy | Makeup Artist |
| Camera | David S. Horsley | Director of Photography |
| Visual Effects | Wah Chang | Visual Effects |
| Sound | Paul Sawtell | Original Music Composer |
| Art | Edward G. Boyle | Set Decoration |
| Costume & Make-Up | Charles Gemora | Makeup Artist |
| Production | Ben Hersh | Production Supervisor |
| Visual Effects | Tim Baar | Visual Effects |
| Visual Effects | Lloyd Vaughan | Animation |
| Visual Effects | Bill Brace | Matte Painter |
| Visual Effects | Jim Danforth | Visual Effects |
| Visual Effects | Tom Holland | Visual Effects |
| Visual Effects | Phil Kellison | Visual Effects |
| Visual Effects | David Pal | Visual Effects |
