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14 Episodes 1977 - 1977
Episode 1
Sun, Jan 30, 197760 mins
The Hardys investigate the disappearance of their own father, a case involving a haunted house, a graveyard, and espionage.
Episode 2
Sun, Feb 6, 197760 mins
Nancy suspects something is amiss when an abandoned lighthouse mysteriously activates.
Episode 3
Sun, Feb 13, 197760 mins
On a trip to a retired police captain's country home, the boys and their friends find him missing and themselves plagued with mysteriously threatening happenings that seem related to an old local legend.
Episode 4
Sun, Feb 20, 197760 mins
While flying, Nancy sees a car go off the road, and reports it. The bridge is out to that section of road, however, and the police don't believe her. Searching for the car leads her to a young mechanic, and a stolen car ring.
Episode 5
Sun, Mar 6, 197760 mins
While investigating the disappearance of a missing scientist, the boys begin to doubt their senses when they discover an isolated estate loaded with bizarre illusions.
Episode 6
Sun, Mar 13, 197760 mins
Nancy's eccentric aunts are selling their property. The day before the deal is reality, a burglar steals all the documents. When Nancy goes to her aunts to explain, she hears mysterious voices in the walls.
Episode 7
Sun, Mar 27, 197760 mins
The boys discover that the missing person investigation they are working on for their dad is linked to his job providing concert security for a rock star Tony Eagle (played by Ricky Nelson)--and that the missing person is linked to a plot to murder Tony.
Episode 8
Sun, Apr 3, 197760 mins
To raise money for charity, Nancy revives a play in a theater that is supposed to be haunted. Actors from the original cast return to do the play, but they are all acting suspicious, and Nancy is determined to discover the secret of the theater phantom.

Episode 9
Sun, Apr 10, 197760 mins
Frank thinks he sees a girl who went missing years ago. When he tries to talk to her she claims that she is someone else. Frank and Joe soon find that she's mixed up in something illegal.
Episode 10
Sun, Apr 17, 197760 mins
During a charity carnival, the wealthy hosts have jewelry stolen from their safe. A young Hispanic friend of Nancy's is accused, after having been seen on the property. Nancy believes the case has more to it than it appears.

Episode 11
Sun, Apr 24, 197760 mins
While vacationing is Hawaii, the boys are robbed. So they set out to try and find the robbers.
Episode 12
Sun, May 1, 197760 mins
Someone is forcing a famous mystery writer to relive one of his novels before killing him.

Episode 13
Sun, May 15, 197760 mins
While scuba diving, Joe and Frank are surprised by a boat that dumps a large package overboard. Taking it home, they discover that it contains a jade figurine which may or may not be very valuable. The boys decide to investigate the origin of the "Jade Kwan Yin" which soon puts them in conflict with an Asian gang of thugs.
Episode 14
Sun, May 22, 197760 mins
At a party after winning a football game, the star feels discomfort. After the party is over, George forgets her purse and goes back for it. Through the window she sees a body on the floor. A young girl - injured or dead. But by the time Nancy and the police arrive, they find no evidence of any crime. Foul play?
