Sealab 2020 was a short-lived cartoon, produced by Hanna-Barbera.

The series was about an underwater research base and had an environmental theme. The series ran on NBC in 1972 and was cancelled after only thirteen half-hour episodes.

It was later re-edited to form the cult TV series Sealab 2021.

Characters - cast

• Doctor Paul Williams - Ross Martin
• Captain Michael Murphy - John Stephenson
• Robert Murphy - Josh Albee
• Sally Murphy - Pamelyn Ferdin
• Lieutenant Sparks - William Callaway
• Hal - Jerry Dexter
• Gail - Ann Jillian
• Ed - Ron Pickard
• Mrs. Thomas - Olga James
• Jamie - Gary Shapiro

Episodes (with original air dates)

• Pilot (unaired)
• Deep Threat (September 9, 1972)
• Lost (September 16, 1972)
• Green Fever (September 23, 1972)
• The Singing Whale (September 30, 1972)
• The Shark Lover (October 7, 1972)
• The Basking Shark (October 14, 1972)
• Where Dangers Are Many (October 21, 1972)
• Backfire (October 28, 1972)
• The Deepest Dive (November 4, 1972)
• The Challenge (November 11, 1972)
• Collision of the Aquarius (November 18, 1972)
• The Capture (November 25, 1972)
• The Artic Story (December 2, 1972)
• S.O.S.- Sealab Ocean Signal (unaired)
• Utopia of Cassidy (unaired)