Watch Voyage to the Bottom of the Sea Season 3 Episode 18 full movie online free in HD with English subtitles – no download needed.
Voyage to the Bottom of the Sea: Tracking mysterious sounds from the depths, the Seaview discovers a group of men in an underwater grotto. Odd elements in the environment have caused the men to mutate into living rock. Their leader, a former submarine captain, wants to use the Seaview to escape the grotto and conquer the world.