When does Sealab 2020 return?

The series was produced by Hanna-Barbera Productions and broadcast on NBC from September 9 to December 2, 1972. The series took place in the year 2020 at Sealab, an underwater research base on the Challenger seamount. A parody follow-up series, entitled Sealab 2021, aired on Cartoon Network in December 2000.