1. Footprints Under The Window / Hunting for Hidden Gold

Air Date : 1969-09-06

2. Mystery of the Desert Giant / The Viking Symbol Mystery

Air Date : 1969-09-13

3. The Secret of the Old Mill / The Missing Chums

Air Date : 1969-09-20

4. The Secret Warning / The Mystery of the Aztec Warrior

When their nocturnal search of the Applegate property is suddenly interrupted, the Hardys learn more about the mysterious treasure---and discover that they're not the only ones looking for it. Applegate: Florenz Ames. Iola: Carole Ann Campbell.

Air Date : 1969-09-27

5. The Mystery of Cabin Island / The Hidden Harbor Mystery

Air Date : 1969-10-04

6. The Secret of the Caves / A Figure In Hiding

Air Date : 1969-10-11

7. The Ghost at Skeleton Rock / The Mystery of the Chinese Junk

Air Date : 1969-10-18

8. The Shore Road Mystery / The Sign of the Crooked Arrow

Air Date : 1969-10-25

9. What Happened at Midnight / The Clue in the Embers

Air Date : 1969-11-01

10. The Clue of the Screeching Owl / The Yellow Feather Mystery

Air Date : 1969-11-08

11. The House on the Cliff / Mystery of the Spiral Bridge

Air Date : 1969-11-15

12. The Mystery at Devil's Paw / The Haunted Fort

Air Date : 1969-11-22

13. The Sinister Signpost / The Melted Coins

Air Date : 1969-11-29

14. The Mark on the Door / The Flickering Torch Mystery

Air Date : 1969-12-06

15. The Secret of Wildcat Swamp / The Clue of the Broken Blade

Air Date : 1969-12-13

16. The Hooded Hawk Mystery / The Short Wave Mystery

Air Date : 1969-12-20

17. The Phantom Freighter / The Secret of Pirates Hill

Air Date : 1969-12-27