The Master Mystery is a 1918 American mystery silent serial film told in 15 installments. The film was directed by Harry Grossman and Burton L. King and written by Arthur B. Reeve and Charles Logue. The film stars Harry Houdini, Marguerite Marsh, Ruth Stonehouse, Edna Britton, William Pike, and Charles Graham. Episode 1 was released on November 18, 1918, by Octagon Films.

Plot

Justice Department agent Quentin Locke is investigating a powerful cartel that is protected by The Automaton, a robot. However, it uses a gas weapon known as The Madagascar Madness.