The Mystery of the Haunted House
Episode: 1x01 | Airdate: Jan 30, 1977
Season 1
The Mystery of Pirate's Cove
Episode: 1x02 | Airdate: Feb 6, 1977
The Mystery of Witches' Hollow
Episode: 1x03 | Airdate: Feb 13, 1977
The Mystery of the Diamond Triangle
Episode: 1x04 | Airdate: Feb 20, 1977
The Disappearing Floor
Episode: 1x05 | Airdate: Mar 6, 1977
Hunting for what may be a UFO, the boys stumble upon a mansion wherein rooms change scale and floors disappear.
The Mystery of the Whispering Walls
Episode: 1x06 | Airdate: Mar 13, 1977
The Flickering Torch Mystery
Episode: 1x07 | Airdate: Mar 27, 1977
A Haunting We Will Go
Episode: 1x08 | Airdate: Apr 3, 1977
The Mystery of the Flying Courier
Episode: 1x09 | Airdate: Apr 10, 1977
The Mystery of the Fallen Angels
Episode: 1x10 | Airdate: Apr 17, 1977
Wipe Out
Episode: 1x11 | Airdate: Apr 24, 1977
The Mystery of the Ghostwriter's Cruise
Episode: 1x12 | Airdate: May 1, 1977
The Mystery of Jade Kwan Yin
Episode: 1x13 | Airdate: Mar 15, 1977
The Mystery of the Solid Gold Kicker
Episode: 1x14 | Airdate: May 22, 1977
Season 2
The Hardy Boys and Nancy Drew Meet Dracula (Part 1)
Episode: 2x01 | Airdate: Sep 11, 1977
The Hardy Boys and Nancy Drew Meet Dracula (Part 2)
Episode: 2x02 | Airdate: Sep 18, 1977
The Mystery of King Tut's Tomb
Episode: 2x03 | Airdate: Sep 25, 1977
The Mystery of the Hollywood Phantom (Part 1)
Episode: 2x04 | Airdate: Oct 2, 1977
At a detectives' convention, Nancy, Joe and Frank encounter intrigue while solving the disappearance of some sleuths.
The Mystery of the Hollywood Phantom (Part 2)
Episode: 2x05 | Airdate: Oct 9, 1977
The Mystery of the African Safari
Episode: 2x06 | Airdate: Oct 16, 1977
The Creatures Who Came from Sunday
Episode: 2x07 | Airdate: Oct 30, 1977
The Strange Fate of Flight 608
Episode: 2x08 | Airdate: Nov 6, 1977
Acapulco Spies
Episode: 2x09 | Airdate: Nov 13, 1977
Nancy Drew's Love Match
Episode: 2x10 | Airdate: Jan 20, 1977
The Silent Scream
Episode: 2x11 | Airdate: Nov 27, 1977
Will the Real Santa Claus..?
Episode: 2x12 | Airdate: Dec 18, 1977
The Lady on Thursday at Ten
Episode: 2x13 | Airdate: Jan 1, 1978
Oh Say Can You Sing
Episode: 2x14 | Airdate: Jan 8, 1978
The House on Possessed Hill
Episode: 2x15 | Airdate: Feb 22, 1979
Sole Survivor
Episode: 2x16 | Airdate: Jan 29, 1978
Voodoo Doll (Part 1)
Episode: 2x17 | Airdate: Feb 12, 1978
Voodoo Doll (Part 2)
Episode: 2x18 | Airdate: Feb 19, 1978
Mystery of the Avalanche Express
Episode: 2x19 | Airdate: Feb 26, 1978
The Mystery Of The Elusive Corpse (aka Death Surf)
Episode: 2x20 | Airdate: Mar 12, 1978
While wind surfing in Hawaii, Frank risks his life in a futile attempt to save a champion swimmer who mysteriously disappears into the surf.
Arson and Old Lace
Episode: 2x21 | Airdate: Mar 31, 1978
The Campus Terror
Episode: 2x22 | Airdate: May 6, 1978
Season 3
The Last Kiss of Summer (Part 1)
Episode: 3x01 | Airdate: Oct 2, 1978
The Last Kiss of Summer (Part 2)
Episode: 3x02 | Airdate: Oct 9, 1978
Assault on the Tower
Episode: 3x03 | Airdate: Oct 15, 1978
In London, a group of former secret service agents plan the biggest robbery in Britain's history. Their target is the crown jewels.
Search for Atlantis
Episode: 3x04 | Airdate: Oct 22, 1978
Dangerous Waters
Episode: 3x05 | Airdate: Oct 29, 1978
Scorpion's Sting
Episode: 3x06 | Airdate: Nov 5, 1978
A kidnapper known as the Scorpion threatens a Senator on the eve of his departure for Puerto Rico, so Joe goes along as his daughter's bodyguard while Frank tries to discover whether the kidnapper's attractive daughter is involved in the plot.
Defection to Paradise (Part 1)
Episode: 3x07 | Airdate: Nov 19, 1978
Defection to Paradise (Part 2)
Episode: 3x08 | Airdate: Nov 26, 1978
Gameplan
Episode: 3x09 | Airdate: Dec 3, 1978
Life on the Line
Episode: 3x10 | Airdate: Jan 14, 1979