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Seaview has been sent to the ocean floor by mysterious pressure impacts. Crane, Sharkey, and Kowalski go out in the Flying Sub to investigate. They, too, are sent to the bottom of the sea. Strange creatures (half men-half fish) present themselves and explain that they intend to take over Seaview (who doesn't?) and eventually the world! Don Matheson starred as Mark Wilson in Land of the Giants.
First Air Date : Sep 14, 1964
Last Air date : Mar 31, 1968
Episode : 110 Episode
Season : 4 Season
Runtime: 50:14 minutes
Studio: ABC
Country: United States of America
Crew: