E1 - Deep Threat

Aired: September 09, 1972

An earthquake spells danger for Sealab when the recurring mass of shock waves ruptures exposed canisters of radioactive waste.

E2 - Lost

Aired: September 16, 1972

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.

E3 - Green Fever

Aired: September 23, 1972

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.

E4 - The Singing Whale

Aired: September 30, 1972

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.

E5 - The Shark Lover

Aired: October 07, 1972

The entire Sealab complex is threatened by an increasing buildup of aggressive sharks in the area.

E6 - The Basking Shark

Aired: October 14, 1972

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.

E7 - Where Dangers Are Many

Aired: October 21, 1972

Ed, Gail, and Hal become "muckrakers" when ocean waters around Sealab become blanketed with layers of loosened silt

E8 - Backfire

Aired: October 28, 1972

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.

E9 - The Deepest Dive

Aired: November 04, 1972

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.

E10 - The Challenge

Aired: November 11, 1972

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.

E11 - Collision of the Aquarius

Aired: November 18, 1972

Human complications make dealing with the mechanical ones more difficult when cargo sub "Aquarius" crashes into Seamount and endangers the Sealab complex.

E12 - The Capture

Aired: November 25, 1972

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.

E13 - The Artic Story

Aired: December 02, 1972

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.