01. Footprints Under The Window / Hunting for Hidden Gold
No details
30min
September 6, 1969
02. Mystery of the Desert Giant / The Viking Symbol Mystery
No details
30min
September 13, 1969
03. The Secret of the Old Mill / The Missing Chums
No details
30min
September 20, 1969
04. 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.
30min
September 27, 1969
05. The Mystery of Cabin Island / The Hidden Harbor Mystery
No details
30min
October 4, 1969
06. The Secret of the Caves / A Figure In Hiding
No details
30min
October 11, 1969
07. The Ghost at Skeleton Rock / The Mystery of the Chinese Junk
No details
30min
October 18, 1969
08. The Shore Road Mystery / The Sign of the Crooked Arrow
No details
30min
October 25, 1969
09. What Happened at Midnight / The Clue in the Embers
No details
30min
November 1, 1969
10. The Clue of the Screeching Owl / The Yellow Feather Mystery
No details
30min
November 8, 1969
11. The House on the Cliff / Mystery of the Spiral Bridge
No details
30min
November 15, 1969
12. The Mystery at Devil's Paw / The Haunted Fort
No details
30min
November 22, 1969
13. The Sinister Signpost / The Melted Coins
No details
30min
November 29, 1969
14. The Mark on the Door / The Flickering Torch Mystery
No details
30min
December 6, 1969
15. The Secret of Wildcat Swamp / The Clue of the Broken Blade
No details
30min
December 13, 1969
16. The Hooded Hawk Mystery / The Short Wave Mystery
No details
30min
December 20, 1969
17. The Phantom Freighter / The Secret of Pirates Hill
No details
30min
December 27, 1969