The Hardy Boys
S01E14
S01E1430 min· aired 12/6/1969

The Mark on the Door / The Flickering Torch Mystery

TMDb0.0
Nexus es850815TMDb ep 1005897TVDb ep 9217730

Overview

Thieves keep stealing secret scientific formulas. The Hardys must solve the disappearance of a criminal informant.

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S01E13
The Sinister Signpost / The Melted Coins
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The Secret of Wildcat Swamp / The Clue of the Broken Blade