Frank Hardy
Tim Considine
Joe Hardy
Tommy Kirk
Landlady
Frances Morris
Policeman
Brick Sullivan
policeman
Mort Mills
Don C. Harvey
Police Detective
Dan Sturkie
William Henry
Jess Kirkpatrick
Silas Applegate
Florenz Ames
Fenton Hardy
Russ Conway
Aunt Gertrude
Sarah Selby
Jackley the Plumber
Robert Foulk
Iola Morton
Carole Ann Campbell
Perry Robinson
Donald MacDonald
Boles - Ex-Gardener
Arthur Shields
Police Sergeant
Charles Cane
Director
Charles F. Haas
Makeup Supervisor
David Newell
Music
William Lava
Theme Song Performance
Thurl Ravenscroft
Visual Effects
Ub Iwerks
Novel
Edward Stratemeyer
Sound
Robert O. Cook
Script Supervisor
Edle Bakke
Teleplay
Jackson Gillis
Cinematography
Gordon Avil
Production Manager
Russ Haverick
Sound Mixer
Dean Thomas
Editor
George Jay Nicholson
Art Direction
Bruce Bushman
Hairstylist
Lois Murray
Production Assistant
Louis Debney
Joseph Dietrick
Set Designer
Fred M. MacLean
Al Teeter
Wardrobe Supervisor
Carl Walker
Costume Designer
Chuck Keehne
Assistant Director
Robert G. Shannon
Marvin Aubrey Davis
Walter Castle