4 Season
110 Episode
Voyage to the Bottom of the Sea - Season 4 Episode 19 Secret of the Deep (1968)
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".
- Country : United States of America
- Genre : Action & Adventure, Drama, Sci-Fi & Fantasy
- Studio : ABC
- Director : Irwin Allen
- Cast : Richard Basehart, David Hedison, Terry Becker, Del Monroe, Paul Trinka, Richard Bull