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Episodes: All (46)

Season: 1  |  2  |  3
Year: 1977  |  1978  |  1979

Season 1

Season 1, Episode 1: The Mystery of the Haunted House

Original Air Date—30 January 1977
The Hardys investigate the disappearance of their own father, a case involving a haunted house, a graveyard, and espionage.

Season 1, Episode 2: The Mystery of Pirate's Cove

Original Air Date—6 February 1977

Season 1, Episode 3: The Mystery of Witches' Hollow

Original Air Date—13 February 1977
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.

Season 1, Episode 4: The Mystery of the Diamond Triangle

Original Air Date—20 February 1977

Season 1, Episode 5: The Disappearing Floor

Original Air Date—6 March 1977
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.

Season 1, Episode 6: The Secret of the Whispering Walls

Original Air Date—13 March 1977

Season 1, Episode 7: The Flickering Torch Mystery

Original Air Date—27 March 1977
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.

Season 1, Episode 8: A Haunting We Will Go

Original Air Date—13 April 1977

Season 1, Episode 9: The Mystery of the Flying Courier

Original Air Date—10 April 1977

Season 1, Episode 10: Mystery of the Fallen Angels

Original Air Date—17 April 1977

Season 1, Episode 11: Wipe-Out

Original Air Date—24 April 1977

Season 1, Episode 12: The Mystery of the Ghostwriters' Cruise

Original Air Date—1 May 1977

Season 1, Episode 13: The Secret of the Jade Kwan Yin

Original Air Date—15 May 1977

Season 1, Episode 14: Mystery of the Solid Gold Kicker

Original Air Date—22 May 1977

Season 2

Season 2, Episode 1: Hardy Boys and Nancy Drew Meet Dracula

Original Air Date—11 September 1977

Season 2, Episode 2: Hardy Boys and Nancy Drew Meet Dracula: Part 2

Original Air Date—18 September 1977

Season 2, Episode 3: The Mystery of King Tut's Tomb

Original Air Date—25 September 1977

Season 2, Episode 4: Mystery of the Hollywood Phantom: Part 1

Original Air Date—2 October 1977
Frank, Joe, and Nancy are at a detective's convention when they discover a mysterious phantom who snatches one detective after another.

Season 2, Episode 5: Mystery of the Hollywood Phantom: Part 2

Original Air Date—9 October 1977
Frank, Joe, and Nancy are at a detective's convention when they discover a mysterious phantom who snatches one detective after another.

Season 2, Episode 6: The Mystery of the African Safari

Original Air Date—16 October 1977

Season 2, Episode 7: The Creatures who came on Sunday

Original Air Date—30 October 1977

Season 2, Episode 8: The Strange Fate of Flight 608

Original Air Date—6 November 1977

Season 2, Episode 9: Acapulco Spies

Original Air Date—13 November 1977

Season 2, Episode 10: Nancy Drew's Love Match

Original Air Date—20 November 1977

Season 2, Episode 11: The Mystery of the Silent Scream

Original Air Date—27 November 1977

Season 2, Episode 12: Will the Real Santa...?

Original Air Date—18 December 1977

Season 2, Episode 13: The Lady on Thursday at Ten

Original Air Date—1 January 1978

Season 2, Episode 14: Oh Say Can You Sing

Original Air Date—8 January 1978

Season 2, Episode 15: The House on Possessed Hill

Original Air Date—22 January 1978

Season 2, Episode 16: Sole Survivor

Original Air Date—29 January 1978

Season 2, Episode 17: Voodoo Doll: Part 1

Original Air Date—12 February 1978

Season 2, Episode 18: Voodoo Doll: Part 2

Original Air Date—19 February 1978

Season 2, Episode 19: Mystery on the Avalanche Express

Original Air Date—26 February 1978

Season 2, Episode 20: Death Surf

Original Air Date—12 March 1978

Season 2, Episode 21: Arson and Old Lace

Original Air Date—1 April 1978

Season 2, Episode 22: Campus Terror

Original Air Date—7 May 1978

Season 3

Season 3, Episode 1: The Last Kiss of Summer: Part 1

Original Air Date—2 October 1978

Season 3, Episode 2: The Last Kiss of Summer: Part 2

Original Air Date—8 October 1978

Season 3, Episode 3: Assault on the Tower

Original Air Date—15 October 1978

Season 3, Episode 4: Search for Atlantis

Original Air Date—22 October 1978

Season 3, Episode 5: Dangerous Waters

Original Air Date—29 October 1978

Season 3, Episode 6: Scorpion's Sting

Original Air Date—12 November 1978

Season 3, Episode 7: Defection to Paradise: Part 1

Original Air Date—19 November 1978

Season 3, Episode 8: Defection to Paradise: Part 2

Original Air Date—26 November 1978

Season 3, Episode 9: Game Plan

Original Air Date—3 December 1978

Season 3, Episode 10: Life on the Line

Original Air Date—14 January 1979

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