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Voyage to the Bottom of the Sea 2×21: 2x21
Dead Men's Doubloons
A 16th century pirate seemingly comes back from the grave to threaten Seaview.
2 - 1Jonah and the Whale Sep. 19, 1965
2 - 2Time Bomb Sep. 26, 1965
2 - 3...And Five of Us Are Left Oct. 03, 1965
2 - 4The Cyborg Oct. 17, 1965
2 - 5Escape from Venice Oct. 24, 1965
2 - 6The Left-Handed Man Oct. 31, 1965
2 - 7The Deadliest Game Nov. 07, 1965
2 - 8Leviathan Nov. 14, 1965
2 - 9The Peacemaker Nov. 21, 1965
2 - 10The Silent Saboteurs Nov. 28, 1965
2 - 11The X Factor Dec. 05, 1965
2 - 12The Machines Strike Back Dec. 12, 1965
2 - 13The Monster from Outer Space Dec. 19, 1965
2 - 14Terror on Dinosaur Island Dec. 26, 1965
2 - 15Killers of the Deep Jan. 02, 1966
2 - 16Deadly Creature Below! Jan. 09, 1966
2 - 17The Phantom Strikes Jan. 16, 1966
2 - 18The Sky's On Fire Jan. 23, 1966
2 - 19Graveyard of Fear Jan. 30, 1966
2 - 20The Shape of Doom Feb. 06, 1966
2 - 21Dead Men's Doubloons Feb. 13, 1966
2 - 22The Death Ship Feb. 20, 1966
2 - 23The Monster's Web Feb. 27, 1966
2 - 24The Menfish Mar. 06, 1966
2 - 25The Mechanical Man Mar. 13, 1966
2 - 26The Return of the Phantom Mar. 20, 1966