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E1 Deep Threat
An earthquake spells danger for Sealab when the recurring mass of shock waves ruptures exposed canisters of radioactive waste.
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E2 Lost
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.
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E3 Green Fever
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.
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E4 The Singing Whale
A new world opens up for Roger Cummings, a disabled boy whose father is doing research at Sealab, when Bobby befriends him and teaches him how to dive.
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E5 The Shark Lover
The entire Sealab complex is threatened by an increasing buildup of aggressive sharks in the area.
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E6 The Basking Shark
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.
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E7 Where Dangers Are Many
Ed, Gail, and Hal become "muckrakers" when ocean waters around Sealab become blanketed with layers of loosened silt
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E8 Backfire
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.
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E9 The Deepest Dive
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.
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E10 The Challenge
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.
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E11 Collision of the Aquarius
Human complications make dealing with the mechanical ones more difficult when cargo sub "Aquarius" crashes into Seamount and endangers the Sealab complex.
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E12 The Capture
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.
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E13 The Arctic Story
The crew of Sealab ventures into the frozen Arctic to rescue two scientists who have been trapped by a blizzard while on a scientific expedition.