Deep Threat
Season 1, Episode 1 Unrated
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An earthquake spells danger for Sealab when the recurring mass of shock waves ruptures exposed canisters of radioactive waste.
Lost
Season 1, Episode 2 Unrated
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An approaching red tide has more than the fish in a panic - the murky oceanic flux, which initiates a process of oxygen depleting, could cut off the life support system of Sealab.
Green Fever
Season 1, Episode 3 Unrated
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A red alert is signaled after a supply ship's concrete mooring, cast off during a hurricane, unwittingly strikes Sealab's control dome and splits a major section of the shell.
The Singing Whale
Season 1, Episode 4 Unrated
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A new world opens up for Roger Cummings, a crippled boy whose father is doing research at Sealab, when Booby befriends him and teaches him how to dive.
The Shark Lover
Season 1, Episode 5 Unrated
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The entire Sealab complex is threatened by an increasing buildup of aggressive sharks in the area.
The Basking Shark
Season 1, Episode 6 Unrated
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When a space probe loses its parachute during reentry and plummets out of sight into the ocean's depths, the staff of Sealab is called on to locate it.
Where Dangers Are Many
Season 1, Episode 7 Unrated
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Ed, Gail, and Hal become "muckrakers" when ocean waters around Sealab become blanketed with layers of loosened silt
Backfire
Season 1, Episode 8 Unrated
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Ed considers resigning from Sealab after Dr. Williams grants permission to a submarine geologist to use explosives on Seamount for the purpose of oil exploration.
The Deepest Dive
Season 1, Episode 9 Unrated
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Hal, Ed, and Gail plunge to the lowest depths of the ocean in a special crystal bell to plant a second seismographic signaling device after the first one mysteriously disappears.
The Challenge
Season 1, Episode 10 Unrated
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An archaeologist enlists the aid of Hal, Ed, and Gail in removing ancient Mayan gold artifacts buried in the hold of a vessel sunk during WWI.
Collision of the Aquarius
Season 1, Episode 11 Unrated
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Human complications make dealing with the mechanical ones more difficult when cargo sub "Aquarius" crashes into Seamount and endangers the Sealab complex.
The Capture
Season 1, Episode 12 Unrated
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Although the Sealab crew doesn't like helping Mr. Harlan trap two animals from every species on the Seamount for a new aquarium, they carry out the task because of orders
The Arctic Story
Season 1, Episode 13 Unrated
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The crew of Sealab 2020 ventures into the frozen Arctic to rescue two scientists who have been trapped by a blizzard while on a scientific expedition.