Sealab 2020 is an American animated television series produced by Hanna-Barbera. The show premiered on NBC on September 9, 1972. The series aired its 13th and final episode on December 2, 1972, with three episodes unaired. As with most Hanna-Barbera series, the show is in occasional rotation on Boomerang, the TV channel that owns the Hanna-Barbera archives
This is the year two thousand and twenty. The place is the Challenger Sea Mount, the top of an underwater mountain, a complex beneath the sea. Two hundred and fifty men, women and children live here. Each of them, a scientist pioneer. For this is our last frontier, a hostile environment which may hold the key to tomorrow. Each day, these oceanauts meet new challenges as they build their city beneath the sea. This is Sealab 2020.
The series took place at Sealab, an underwater research base based on the Challenger Seamount (an underwater mountain), in the year 2020 (48 years in the future at the time of broadcast). Commanded by Captain Murphy, Sealab was home to 250 people, and was dedicated to the exploration of the seas and the protection of marine life.