| Release Date | 30 May 1969 |
| Tagline | He's Back!!! The World's Most Evil Man with a Fiendish Plan of Conquest |
| Genre | Action, Adventure, Crime, Horror |
| Country | West GermanyItalySpainUKLiechtenstein |
| Filming Locations | Estudios Cinematográficos Balcázar, Esplugues de Llobregat, Barcelona, Cataluña, Spain |
| Language | English |
| Sound Mix | Mono |
| Color | Color |
The Castle of Fu Manchu (1969) also known by its German title Die Folterkammer des Dr. Fu Man Chu, is the fifth and final Fu Manchu film with Christopher Lee portraying the title character. The spy/crime film was filmed on location in Spain and Istanbul and originally released in West Germany in 1969. It was directed by Jesús Franco and also stars Richard Greene as Nayland Smith and Howard Marion-Crawford as Dr. Petrie. Its other titles are Assignment Istanbul and The Torture Chamber of Fu Manchu.