The Riders of the Whistling Skull
When Professor Marsh disappears while searching for the lost city of Lukachukai, his daughter enlists the help of the Three Mesquiteers.
Cast: Robert Livingston, Ray Corrigan, Max Terhune, Mary Russell, Roger Williams, Fern Emmett, C. Montague Shaw, Yakima Canutt, John Ward, George Godfrey, Earle Ross, Frank Ellis, Chief Thundercloud
Crew: Mack V. Wright (Director), Nat Levine (Producer), Oliver Drake (Screenplay), William Colt MacDonald (Novel), Sol C. Siegel (Associate Producer)