When Professor Marsh disappears while searching for the lost city of Lukachukai, his daughter enlists the help of the Three Mesquiteers.
Robert Livingston
as Stony Brooke
Ray Corrigan
as Tucson Smith
Max Terhune
as Lullaby Joslin
Mary Russell
as Betty Marsh
Roger Williams
as Rutledge
Fern Emmett
as Henrietta McCoy
C. Montague Shaw
as Professor Flaxon
Yakima Canutt
as Otah
John Ward
as Professor Brewster
George Godfrey
as Professor Fronc
Earle Ross
as Professor Cleary
Frank Ellis
as Coggins
