Sealab 2020 is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 animated television series produced by Hanna-Barbera

Hanna-Barbera

Hanna-Barbera Productions, Inc. was an American animation studio that dominated North American television animation during the second half of the 20th century...

. The series is about the crew of an underwater research base and has an environmental

Environmentalism

Environmentalism is a broad philosophy, ideology and social movement regarding concerns for environmental conservation and improvement of the health of the environment, particularly as the measure for this health seeks to incorporate the concerns of non-human elements...

 theme. The series premiered on the television network

Television network

A television network is a telecommunications network for distribution of television program content, whereby a central operation provides programming to many television stations or pay TV providers. Until the mid-1980s, television programming in most countries of the world was dominated by a small...

 NBC

NBC

The National Broadcasting Company is an American commercial broadcasting television network and former radio network headquartered in the GE Building in New York City's Rockefeller Center with additional major offices near Los Angeles and in Chicago...

 on September 9, 1972. The show aired its 13th and final episode on December 2, 1972, leaving three episodes unaired.

The complete series has not yet been released on DVD

DVD

A DVD is an optical disc storage media format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. DVDs offer higher storage capacity than Compact Discs while having the same dimensions....

, although the pilot episode "Deep Threat" is included in the Warner Bros.

Warner Bros.

Warner Bros. Entertainment, Inc., also known as Warner Bros. Pictures or simply Warner Bros. , is an American producer of film and television entertainment.One of the major film studios, it is a subsidiary of Time Warner, with its headquarters in Burbank,...

 Saturday Morning Cartoons: 1970s Vol. 2 DVD set. The Milton Bradley Company

Milton Bradley Company

The Milton Bradley Company is an American game company established by Milton Bradley in Springfield, Massachusetts, in 1860. In 1920, it absorbed the game production of McLoughlin Brothers, formerly the largest game manufacturer in the United States, and in 1987, it purchased Selchow and Righter,...

 made a board game based on the series.

Scenes from Sealab 2020 were later re-edited and dubbed with new voices by 70/30 Productions

70/30 Productions

70/30 Productions was an animation production house located on the south side of Atlanta, Georgia close to Interstate 20. They are the creators of Sealab 2021, Frisky Dingo and its spin-off series The Xtacles for Cartoon Network's Adult Swim....

 to create the series Sealab 2021

Sealab 2021

Sealab 2021 is an American animated television series. It was shown on Cartoon Network's adult-oriented programming block, Adult Swim. It premiered on November 23, 2000 and the final episode aired on April 25, 2005...

, which aired on the Adult Swim

Adult Swim

Adult Swim is an adult-oriented Cable network that shares channel space with Cartoon Network from 9:00 pm until 6:00 am ET/PT in the United States, and broadcasts in countries such as Australia and New Zealand...

 channel.

Episodes

• PC = Production code

  №	Title	PC	Airdate
  SL-1	"Deep Threat"	57-1	1972.Sep.09
  SL-2	"Lost"	57-4	1972.Sep.16
  SL-3	"Green Fever"	57-2	1972.Sep.23
  SL-4	"The Singing Whale"	57-3	1972.Sep.30
  SL-5	"The Shark Lover"	57-5	1972.Oct.07
  SL-6	"The Basking Shark"	57-7	1972.Oct.14
  SL-7	"Where Dangers Are Many"	57-8	1972.Oct.21
  SL-8	"Backfire"	57-6	1972.Oct.28
  SL-9	"The Deepest Dive"	57-9	1972.Nov.04
  SL-10	"The Challenge"	57-10	1972.Nov.11
  SL-11	"Collision of the Aquarius"	57-11	1972.Nov.18
  SL-12	"The Capture"	57-13	1972.Nov.25
  SL-13	"The Arctic Story"	57-12	1972.Dec.02

Unaired episodes

• "Pilot"
• "S.O.S.: Sealab Ocean Signal"
• "Utopia of Cassidy"

Voice cast

• Ross Martin
  Ross Martin
  Ross Martin was a Polish-born American Emmy-nominated actor known for playing Artemus Gordon in the western TV series The Wild Wild West, starring Robert Conrad, and Andamo on Mr...
  
   as Doctor Paul Williams
• John Stephenson
  John Stephenson (actor)
  John Stephenson is an American actor and voice actor. He has also been credited as John Stevenson...
  
   as Captain Michael Murphy
• Josh Albee
  Josh Albee
  Josh Albee is an American television actor, known for his work as a child actor during the 1970s, and for the role as the young, mute boy in the feature film, Jeremiah Johnson....
  
   as Robert Murphy
• Pamelyn Ferdin
  Pamelyn Ferdin
  Pamelyn Ferdin is a former American television and film child actor, active both in live action and as a voice actress in the 1960s, 1970s, and 1980s and has since appeared in several voice acting roles as late as 2009...
  
   as Sally Murphy
• William Callaway as Lieutenant Sparks
• Jerry Dexter
  Jerry Dexter
  Jerry Dexter is a voice actor best known for voicing heroic young men in Hanna-Barbera cartoons from the 1960s to the 1980s. He is a California native...
  
   as Hal
• Ann Jillian
  Ann Jillian
  Ann Jillian is an American actress, who started acting at age 10. Her career reached its zenith in the 1980s, with her best-known role being that of waitress Cassie Cranston on the sitcom It's a Living.-Early life and career:...
  
   as Gail
• Ron Pinkard
  Ron Pinkard
  Ronald F. Pinkard is an African-American actor best known for his role as Dr...
  
  as Ed
• Olga James as Mrs. Thomas
• Gary Shapiro as Jamie