seaQuest DSV - Season 2 - Eps 6: Playtime
In response to the voice of a child calling for help, the seaQuest journeys through an underwater vortex and find themselves 250 years in the future where humans are on the brink of extinction.
About seaQuest DSV

Title: seaQuest DSV
First Air Date: 1993-09-12
Last Air Date: 1996-06-09
Status: Ended
Rating: 7/10 (from 132 votes)
Language: EN
Seasons: 4
Total Episodes: 58
Network: NBC
Genres: Action & Adventure, Sci-Fi & Fantasy
Production Companies: Universal Television, Amblin Entertainment
Synopsis
In the early 21st century, mankind has colonized the oceans. The United Earth Oceans Organization enlists Captain Nathan Bridger and the submarine seaQuest DSV to keep the peace and explore the last frontier on Earth.
Cast

Michael Ironside
Captain Oliver Hudson

Jonathan Brandis
Lucas Wolenczak

Don Franklin
Commander Jonathan Ford

Michael DeLuise
Seaman Anthony Piccolo

Ted Raimi
Lieutenant Tim O'Neill

Kathy Evison
Lieutenant Lonnie Henderson

Elise Neal
Lieutenant J.J. Fredericks

Peter DeLuise
Dagwood

Frank Welker
Darwin (voice)