Ace Drummond

John 'Dusty' King

as Ace Drummond

Jean Rogers

as Peggy Trainor

Noah Beery Jr.

as Jerry

Jackie Morrow

as Billy Meredith

Chester Gan

as Kai-Chek

Guy Bates Post

as The Grand Lama

Lon Chaney Jr.

as Henchman Ivan

Selmer Jackson

as William Meredith, Sr.

Robert Warwick

as Winston

James B. Leong

as Henry Kee

Arthur Loft

as Chang-Ho

James Eagles

as Johnny Wong, Radio Operator

C. Montague Shaw

as Dr. Trainor

Frederick Vogeding

as Bauer

Al Bridge

as Paul Wyckoff