The Riders of the Whistling Skull 1937
When Professor Marsh disappears while searching for the lost city of Lukachukai, his daughter enlists the help of the Three Mesquiteers.
- Released: 1937-01-04
- Runtime: 53 minutes
- Genre: Drama, Western
- Stars: Mary Russell, John Van Pelt, Robert Livingston, C. Montague Shaw, Ray Corrigan, George Godfrey, John Ward, Max Terhune, Chief Thundercloud, Fern Emmett, Earle Ross, Roger Williams, Yakima Canutt, Frank Ellis
- Director: Mack V. Wright