"[to Sir Lionel Barton, describing the "Bell Torture"] You've read about this, Barton: the torture of the bell: it never stops. Minute after minute, hour after hour, day after day. Seems harmless, doesn't it? Just a bell ringing. But the percussion and the repercussion of sound against your eardrums will soften and destroy them until the sound is magnified a thousand times. You can't move. You can't sleep. You will be frantic with thirst. You will be unspeakably foul. But here you will lie, day after day, until you tell."

"[to Sheila Barton and Dr. von Berg] Silence! It is my pleasure to show you how I entertain my guests. You, Miss Barton, will be taken to the Room of the Golden Peacock, where you will be prepared as a sacrifice to our gods! And you? You, my dear doctor, will follow my slaves to the Room of the Slim Silver Fingers, where I am sure you will be more than comfortable! And at sunrise tomorrow, as my chieftains are assembled in the temple below, you two, and your compatriot, Sir Nayland Smith, will have the pleasure of entering your Christian heaven together! It will be your honor to be the first white martyrs to perish at the hands of the new Genghis Kahn! I congratulate you!"

"[to Terence Granville, who is strapped to an operating table] This serum, distilled from dragon's blood, my own blood, the organs of different reptiles, and mixed with the magic brew of the sacred seven herbs, will temporarily change you into the living instrument of my will. You will do as I command!"

"[to horde of Asians] Men of Asia! The skies are red with the thunderbolts of Genghis Khan! They rain down on the white race... and burn them!"

"I have seen a vision, the prophecy is about to be fulfilled. Genghis Khan, masked in his plate of gold, bearing the scimitar that none but he could ever wield comes back to us. I've seen a vision of countless hordes swarming to recapture the world. I've seen them victorious. I've heard the shouts of the dead and the dying drowned by the victorious cries of our people. Genghis Khan comes back! Genghis Khan leads the East against the world!"

"I am a doctor of philosophy from Edinburgh, a doctor of law from Christ's College, a doctor of medicine from Harvard. My friends, out of courtesy, call me 'Doctor'."

"The Frankenstein of the Orient!"

"Boris Karloff — Dr. Fu Manchu"

"Bramwell Fletcher — Ronald Petrie"

"Sessue Hayakawa — Ah Kee"

"Frances Dade — Joan Marshall"

"Holmes Herbert — Sir John Petrie"

"Anna May Wong — Princess Ling Moy"

"Warner Oland — Dr. Fu Manchu"

"Lawrence Grant — Sir Basil Courtney"

"The mysterious sign of vengeance warns of the Return of Dr. Fu Manchu."

"Harold Minjir — Rogers"

"Nicholas Soussanin — Morloff"

"Warner Oland — Fu Manchu"

"E. Alyn Warren — Lu Chung"

"O. P. Heggie — Inspector Nayland Smith"

"The Arch-Fiend Lives Again!"

"Neil Hamilton — Dr. Jack Petrie"

"Jean Arthur — Lia Eltham"

"Helen Vinson — Nurse"

"Alice White — Margot"

"Phil Baker — Absent-minded doctor"

"Alexander Woollcott — himself"

"Victor Moore — Colonel Trivers"

"Ruth Etting — Ruth"

"Hugh O'Connell — Patsy"

"You wanna get anywhere in this world, Pat, you gotta play every card in the deck... and I'm playin' 'em all."

"I'll make Trivers Livers live. I'll put Trivers Livers on the plate of everybody within earshot."

"Ed Wolff — The Robot"

"Why, your troubles are over. When I handle your liver, I'll bring home the bacon."

"The Low Down on the High-Ups of Radioland! A Knockout Cast, IN THE YEAR'S SNAPPIEST SHOW!"

"Dora Clement — Ann Zorka"

"Anthony Averill — Rankin, a foreign spy"

"Edmund Lowe — Phillip "Gift of Gab" Gabney"

"Hugh Huntley — Perkins, Dr. Mallory's lab assistant"

"Edwin Stanley — Dr. Fred Mallory"

"Regis Toomey — Lt. Jim Daley, G-Man"

"Jack C. Smith — Monk, Dr. Zorka's assistant"

"Edward Van Sloan — Jarvis, foreign spy chief"

"Gloria Stuart — Barbara Kelton"