Assignment Istanbul was released in the year 1969。Assignment Istanbul is also called as Folterkammer des Dr. Fu Man Chu, Die, The Torture Chamber of Fu Manchu, Fu Manchu's Castle, Folterkammer des Dr. Fu Man Chu, Castillo de Fu-Manchu, Castello di Fu Manchu, Sax Rohmer's The Castle of Fu Manchu。

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 Dr. Nayland Smith.