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01
Footprints Under The Window / Hunting for Hidden GoldUp next
Sep 6, 1969
02
Mystery of the Desert Giant / The Viking Symbol Mystery
Sep 13, 1969
03
The Secret of the Old Mill / The Missing Chums
Sep 20, 1969
04
The Secret Warning / The Mystery of the Aztec Warrior
Sep 27, 1969
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.
05
The Mystery of Cabin Island / The Hidden Harbor Mystery
Oct 4, 1969
06
The Secret of the Caves / A Figure In Hiding
Oct 11, 1969
07
The Ghost at Skeleton Rock / The Mystery of the Chinese Junk
Oct 18, 1969
08
The Shore Road Mystery / The Sign of the Crooked Arrow
Oct 25, 1969
09
What Happened at Midnight / The Clue in the Embers
Nov 1, 1969
10
The Clue of the Screeching Owl / The Yellow Feather Mystery
Nov 8, 1969
11
The House on the Cliff / Mystery of the Spiral Bridge
Nov 15, 1969
12
The Mystery at Devil's Paw / The Haunted Fort
Nov 22, 1969
13
The Sinister Signpost / The Melted Coins
Nov 29, 1969
14
The Mark on the Door / The Flickering Torch Mystery
Dec 6, 1969
15
The Secret of Wildcat Swamp / The Clue of the Broken Blade
Dec 13, 1969
16
The Hooded Hawk Mystery / The Short Wave Mystery
Dec 20, 1969
17
The Phantom Freighter / The Secret of Pirates Hill
Dec 27, 1969
