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Dr. Benton Quest is summoned to the Southeast Asian country of Quetong by the local police commissioner. It seems that four of the commissioner's best men have disappeared without a trace while investigating the mysterious deaths of thousands of fish. In their own efforts to get to the bottom of things, the Quests stumble upon a secret missile base, hidden in a treacherous swamp. The last of the "original" Jonny Quest episodes to be produced -- though not the last one shown in prime time on ABC -- "The Quetong Missile Mystery" was originally broadcast on February 11, 1965.