Calificación
Reparto

Shaun Cassidy
Joe Hardy

Parker Stevenson
Frank Hardy

Pamela Sue Martin
Nancy Drew

Paul Williams
Allison Troy

John van Dreelen
Mayor

Leon Askin
Haufman Berger

Lorne Greene
Inspector Hans Stavlin

Ed Gilbert
Fenton Hardy

Ruth Cox
Bess Marvin

Carl Esmond
Kolbe

Bernie Taupin
Tim Carstairs

Norbert Weisser
Gurd

Claude Bessy
Frenchie

Fritz Field
Fritz

Norbert Schiller
Caretaker

Albert Carrier
Paris Hotel Clerk