Tim Considine
as
Frank Hardy
Tommy Kirk
as
Joe Hardy
Florenz Ames
as
Silas Applegate
Russ Conway
as
Fenton Hardy
Sarah Selby
as
Aunt Gertrude
Robert Foulk
as
Jackley the Pl...
Carole Ann Cam...
as
Iola Morton
Donald MacDona...
as
Perry Robinson
Arthur Shields
as
Boles - Ex-Gar...
Charles Cane
as
Police Sergeant
Frances Morris
as
Landlady
Brick Sullivan
as
Policeman
Mort Mills
as
policeman
Don C. Harvey
as
Policeman
Dan Sturkie
as
Police Detecti...
William Henry
as
Policeman
Jess Kirkpatri...
as
Policeman