The Hardy Boys / Nancy Drew Mysteries · SEASON 1
The Mystery of the Diamond Triangle
Episode 4 · 1977-02-20

- Mystery
- Action & Adventure
Episode overview
After Nancy and her girlfriend, George, see an automobile run off the road. Nancy tells her boyfriend, Ned Nickerson, to report it to the sheriff. Later the sheriff tells Nancy that his men could not find any signs of an accident, and that the road has been closed for a long time. Nancy attempts to unravel the bizarre occurrence on her own, and soon finds herself in the midst of danger.
48 minutes
Season 1 episodes
1. The Mystery of the Haunted House1977-01-30
2. The Mystery of Pirate's Cove1977-02-06
3. The Mystery of Witches' Hollow1977-02-13
4. The Mystery of the Diamond Triangle1977-02-20
5. The Disappearing Floor1977-03-06
6. The Secret of the Whispering Walls1977-03-13
7. The Flickering Torch Mystery1977-03-27
8. A Haunting We Will Go1977-04-03
9. The Mystery of the Flying Courier1977-04-10
10. Mystery of the Fallen Angels1977-04-17
11. Wipe Out1977-04-24
12. The Mystery of Ghostwriters' Cruise1977-05-01
13. The Secret of the Jade Kwan Yin1977-05-15
14. Mystery of the Solid Gold Kicker1977-05-22