E1 · Footprints Under The Window / Hunting for Hidden Gold
1969 · 30m
E2 · Mystery of the Desert Giant / The Viking Symbol Mystery
1969 · 30m
E3 · The Secret of the Old Mill / The Missing Chums
1969 · 30m
E4 · The Secret Warning / The Mystery of the Aztec Warrior
1969 · 30m
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.
E5 · The Mystery of Cabin Island / The Hidden Harbor Mystery
1969 · 30m
E6 · The Secret of the Caves / A Figure In Hiding
1969 · 30m
E7 · The Ghost at Skeleton Rock / The Mystery of the Chinese Junk
1969 · 30m
E8 · The Shore Road Mystery / The Sign of the Crooked Arrow
1969 · 30m
E9 · What Happened at Midnight / The Clue in the Embers
1969 · 30m
E10 · The Clue of the Screeching Owl / The Yellow Feather Mystery
1969 · 30m
E11 · The House on the Cliff / Mystery of the Spiral Bridge
1969 · 30m
E12 · The Mystery at Devil's Paw / The Haunted Fort
1969 · 30m
E13 · The Sinister Signpost / The Melted Coins
1969 · 30m
E14 · The Mark on the Door / The Flickering Torch Mystery
1969 · 30m
E15 · The Secret of Wildcat Swamp / The Clue of the Broken Blade
1969 · 30m
E16 · The Hooded Hawk Mystery / The Short Wave Mystery
1969 · 30m
E17 · The Phantom Freighter / The Secret of Pirates Hill
1969 · 30m
Cast
Byron Kane
Joe Hardy / Fenton Hardy (voice)
Dal McKennon
Frank Hardy / Chubby Morton / Pete Jones (voice)
Jane Webb
Wanda Kay Breckenridge / Aunt Gertrude Hardy (voice)
