Ace Drummond
John 'Dusty' King
Peggy Trainor
Jean Rogers
Chang-Ho
Arthur Loft
Johnny Wong, Radio Operator
James Eagles
Dr. Trainor
C. Montague Shaw
Bauer
Frederick Vogeding
Paul Wyckoff
Al Bridge
Jerry
Noah Beery Jr.
Billy Meredith
Jackie Morrow
Kai-Chek
Chester Gan
The Grand Lama
Guy Bates Post
Henchman Ivan
Lon Chaney Jr.
William Meredith, Sr.
Selmer Jackson
Winston
Robert Warwick
Henry Kee
James B. Leong
Director
Ford Beebe
Clifford Smith