Episode 1
Deep Threat
An earthquake spells danger for Sealab when the recurring mass of shock waves ruptures exposed canisters of radioactive waste.
Episode credits
Guest stars Olga James
TV series
Sealab 2020
1972TV-Y71 season7.4 / 10
Commanded by Captain Michael Murphy, Sealab is dedicated to the exploration of the seas and the protection of marine life. Among other things, the crew of Sealab faced such challenges as attacks from sharks and giant squids, potential environmental disasters, and threats to Sealab and marine life from shipping.
Availability
Not streaming in United States
Checked Jul 22, 2026
Sealab 2020 premiered September 9, 1972. We don't have a confirmed streaming, rental or purchase option yet.
Synopsis
Commanded by Captain Michael Murphy, Sealab is dedicated to the exploration of the seas and the protection of marine life. Among other things, the crew of Sealab faced such challenges as attacks from sharks and giant squids, potential environmental disasters, and threats to Sealab and marine life from shipping.
Season 1 episodes
Choose an episode, then use the watch options above for the show.
Where to watch Sealab 2020
Episode 2
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.
Episode credits
Guest stars Olga James
Episode 3
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.
Episode credits
Guest stars Olga James
Episode 4
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.
Where to watch Sealab 2020
Episode 5
The Shark Lover
The entire Sealab complex is threatened by an increasing buildup of aggressive sharks in the area.
Episode credits
Guest stars Olga James
Episode 6
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.
Episode credits
Guest stars Olga James
Episode 7
Where Dangers Are Many
Ed, Gail, and Hal become "muckrakers" when ocean waters around Sealab become blanketed with layers of loosened silt
Episode credits
Guest stars Olga James
Episode 8
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.
Episode credits
Guest stars Olga James
Episode 9
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.
Episode credits
Guest stars Olga James
Episode 10
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.
Episode credits
Guest stars Olga James
Episode 11
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.
Episode credits
Guest stars Olga James
Episode 12
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.
Episode credits
Guest stars Olga James
Episode 13
The Arctic Story
finale
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.
Episode credits
Guest stars Olga James
Episode information updated Jul 24, 2026
Available now in United States
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Cast
Pamelyn Ferdin
John StephensonJerry Dexter
Ann Jillian
Ross Martin
Josh Albee
William Callaway
Olga JamesMrs. Thomas (voice)Credits
- Created by
- Joseph Barbera, William Hanna, Alex Toth
Production details
- Status
- Ended
- Series type
- Scripted
- Episodes
- 13
- Original language
- English
Networks & production
NBCUnited States
Hanna-Barbera CartoonsUnited States
Themes
futureunderwater