The Hardy Boys / Nancy Drew Mysteries - Season 3 - Eps 3: Assault on the Tower
Joe and Frank Hardy go to London to find their missing father, but when Frank goes missing as well, Joe and an agent from the British Ministry must find a traitor together.
About The Hardy Boys / Nancy Drew Mysteries

Title: The Hardy Boys / Nancy Drew Mysteries
First Air Date: 1977-01-30
Last Air Date: 1979-01-14
Status: Ended
Rating: 7.1/10 (from 27 votes)
Language: EN
Seasons: 3
Total Episodes: 46
Network: ABC
Genres: Mystery, Action & Adventure
Production Companies: Unknown
Synopsis
The Hardy Boys/Nancy Drew Mysteries is a television series which aired for three seasons on ABC. The series starred Parker Stevenson and Shaun Cassidy as amateur sleuth brothers Frank and Joe Hardy, respectively, and Pamela Sue Martin as girl detective Nancy Drew. The Hardy Boys/Nancy Drew Mysteries was unusual in that it often dealt with the characters individually, in an almost anthological style. That is, some episodes featured only the Hardy Boys and others only Nancy Drew.
Cast

Shaun Cassidy
Joe Hardy

Parker Stevenson
Frank Hardy