Season
Season 4 Episode
- Season 4 Fires of Death
- Season 4 The Deadly Dolls
- Season 4 Cave of the Dead
- Season 4 Journey with Fear
- Season 4 Sealed Orders
- Season 4 Man of Many Faces
- Season 4 Fatal Cargo
- Season 4 Time Lock
- Season 4 Rescue
- Season 4 Terror
- Season 4 A Time to Die
- Season 4 Blow Up
- Season 4 Deadly Amphibians
- Season 4 The Return of Blackbeard
- Season 4 Terrible Leprechaun
- Season 4 The Lobster Man
- Season 4 Nightmare
- Season 4 The Abominable Snowman
- Season 4 Secret of the Deep
- Season 4 Man-Beast
- Season 4 Savage Jungle
- Season 4 Flaming Ice
- Season 4 Attack!
- Season 4 Edge of Doom
- Season 4 The Death Clock
- Season 4 No Way Back
Voyage to the Bottom of the Sea - Season 4 Episode 19 Secret of the Deep
7.73 50 minutes 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".
