Secret of the Deep
Naval ships have been disappearing, and Seaview is on a hunt for the undersea installation responsible. They find a sea-lab that is not only well-armed but surrounded by overgrown and ferocious sea-creatures. To complicate matters, the guest expert aboard is a traitor. Various "dangerous denizens" of the deep from earlier episodes reappear here, thanks to re-used footage: there's a whale, and one of those globular-eyed bottom-dwelling monsters seen in such episodes as "Deadly Creature Below".
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Airs
Sun, Feb 11, 1968
52 min
Show
Voyage to the Bottom of the Sea
110 episodes
Episode
S4 · E19
in Voyage to the Bottom of the Sea