Christopher Lee credited as playing...
Fu Manchu
- Fu Manchu: The entrance to eternity. Beyond that door there is a tunnel which leads directly to the sea. Cisterns of water are poised above it. The touch of a lever will release hundreds of thousands of gallons of water into that tunnel, and combined with professor Heracles' crystals this can transform the entire sea into one gigantic block of ice.
- Fu Manchu: [opening line] This is Fu Manchu. Once again the world is at my mercy. I have conquered not only the mysteries of the continent but now of the oceans too. In the tropical waters of the south Atlantic my hand stretches out to turn water into ice - and to transform safety into the deadliest peril. In a few moments the proof of my mastery will be complete.
- Fu Manchu: I have brought you here to save the life of someone whose knowledge I require as a thirsty man needs water. Crystal clear water, doctor Kessler. The name of the person to whom I refer is professor Heracles.
- Fu Manchu: [immediately after surviving Omar Pascha's attempt on his life] Take him to the laboratory.
- Fu Manchu: [Over the radio] This is my ultimatum; within the next few hours the Bosphorus and the city of Istanbul will be destroyed.
- Dr. Petrie: It's not true! It can't be true!
- Inspector Ahmet: Doctor Petrie, calm yourself.
- Fu Manchu: [Over the radio] The powers of the world have relied upon one man: Nayland-Smith. Nayland-Smith is dead.