The evil mastermind Fu Manchu plots his latest scheme to basically freeze over the Earth's oceans with his diabolical new device. Opposing him is his arch-nemesis, Interpol's very British Nayland Smith.
Unfortunately the movie The Castle of Fu Manchu is not yet available on HBO Max.
| Directing | Jesús Franco | Director |
| Writing | Jaime Jesús Balcázar | Dialogue |
| Writing | Manfred Barthel | Screenplay |
| Writing | Michael Haller | Dialogue |
| Writing | Sax Rohmer | Novel |
| Writing | Harry Alan Towers | Screenplay |
| Production | Harry Alan Towers | Producer |
| Production | Jaime Jesús Balcázar | Producer |
| Sound | Carlos Camilleri | Music |
| Sound | Malcomb Shelby | Music |
| Camera | Manuel Merino | Director of Photography |
| Editing | John Colville | Editor |
| Art | Santiago Ontañón | Co-Art Director |
| Costume & Make-Up | Berenice Sparano | Costume Design |
| Costume & Make-Up | Ascensión Hernández | Makeup Artist |
| Costume & Make-Up | Adrián Jaramillo | Makeup Artist |
| Costume & Make-Up | Peter Jonas | Makeup Artist |
| Costume & Make-Up | Vicenta Salvadó | Hairstylist |
