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