Secret of the Deep (S04E19)
S04E19
Title: Mystery Beneath the Waves Plot: Naval vessels are vanishing, prompting the Seaview to investigate the underwater facility behind these incidents. They discover a heavily fortified sea-lab, guarded by monstrous sea creatures. Adding to the tension, their visiting specialist is secretly working against them. Throughout their perilous journey, familiar menacing marine life resurfaces from past encounters, including a massive whale and a peculiar, bulbous-eyed beast that fans will recognize from episodes like "Deadly Creature Below." The crew must navigate these threats while uncovering the truth behind the lab’s sinister operations.
Show
Justice League
Episode
S04E19
Air Date
Feb 11, 1968
Season 4 Episodes
S04E01
Fires of Death
S04E02
The Deadly Dolls
S04E03
Cave of the Dead
S04E04
Journey with Fear
S04E05
Sealed Orders
S04E06
Man of Many Faces
S04E07
Fatal Cargo
S04E08
Time Lock
S04E09
Rescue
S04E10
Terror
S04E11
A Time to Die
S04E12
Blow Up
S04E13
Deadly Amphibians
S04E14
The Return of Blackbeard
S04E15
Terrible Leprechaun
S04E16
The Lobster Man
S04E17
Nightmare
S04E18
The Abominable Snowman
S04E19
Secret of the Deep
S04E20
Man-Beast
S04E21
Savage Jungle
S04E22
Flaming Ice
S04E23
Attack!
S04E24
Edge of Doom
S04E25
The Death Clock
S04E26
No Way Back