Tim Considine
Frank Hardy
Tommy Kirk
Joe Hardy
Sarah Selby
Aunt Gertrude Hardy
Carole Ann Campbell
Iola Morton
Andy Clyde
Lacey
Bob Amsberry
Farmer
John Baer
Eric
Hugh Sanders
Mr. Binks
John Harmon
Bray
Russ Conway
Fenton Hardy
Yvonne Lime
Gloria Binks
Paul Birch
Banker
Gail Bonney
Prim Woman
Tyler McVey
Police Chief
Paul Wexler
Fred
Florenz Ames
Silas Applegate
المخرج
R.G. Springsteen
الكتّاب
Jackson Gillis، Edward Stratemeyer
Walt Disney Productions