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.

• Mack V. WrightDirector
• Oliver DrakeScreenplay
• John RathmellScreenplay

• Robert LivingstonStony Brooke
• Ray CorriganTucson Smith
• Max TerhuneLullaby Joslin
• Mary RussellBetty Marsh
• Roger WilliamsRutledge
• Fern EmmettHenrietta McCoy
• C. Montague ShawProfessor Flaxon
• Yakima CanuttOtah
• John WardProfessor Brewster
• George GodfreyProfessor Fronc
• Earle RossProfessor Cleary
• Frank EllisCoggins