Edna Murphy
Corinne Grant
Charley Chase
Glen Harper
Hayford Hobbs
Donald Bartlett
William F. Moran
Dr. Philip Markham
Scott Pembroke
Dr. Harrison
William Gillespie
John Dryden
Glenn Tryon
Reporter
Ray Myers
Clinton Hodge
Colin Kenny
Stanley Fleming
Eddie Baker
Jack Reynolds (as Ed Baker)
Fred McPherson
Professor Comstock
Frank Lackteen
Malay George
Sam Lufkin
Sam Comstock
Fong Wong
Oracle of the Sands