Voyage to the Bottom of the Sea (1964)

S4E18 The Abominable Snowman

Admiral Nelson asserts, "But that's not the aim of a man -- or a scientist!" At a research facility in Antarctica, the crew stumbles upon a mysterious 'tropical paradise,' only to find that many of the scientists have vanished. When two unconscious survivors are rescued and brought onto the Seaview, a lethal presence begins to haunt the ship's hallways. Meanwhile, the external temperature continues to climb...