On screen
Cast
12 credited performers
Tim Considine
Frank Hardy
Tommy Kirk
Joe Hardy
Russ Conway
Fenton Hardy
Sarah Selby
Aunt Gertrude Hardy
Artwork unavailable
Carole Ann Campbell
Iola Morton
Artwork unavailable
Florenz Ames
Silas Applegate
Robert Foulk
Jackley the Plumber
Artwork unavailable
Donald MacDonald
Perry Robinson
Arthur Shields
Boles
Andy Clyde
Lacey
John Baer
Eric
Hugh Sanders
Mr. Binks