Calificación
Reparto

John 'Dusty' King
Ace Drummond

Jean Rogers
Peggy Trainor

Noah Beery Jr.
Jerry

Jackie Morrow
Billy Meredith

Chester Gan
Kai-Chek

Guy Bates Post
The Grand Lama

Lon Chaney Jr.
Henchman Ivan

Selmer Jackson
William Meredith, Sr.

Robert Warwick
Winston

James B. Leong
Henry Kee

Arthur Loft
Chang-Ho

James Eagles
Johnny Wong, Radio Operator

C. Montague Shaw
Dr. Trainor

Frederick Vogeding
Bauer

Al Bridge
Paul Wyckoff