6.590 minSeason 1 • Episode 13
LatestMark goes undercover to investigate members of a carnival planning to break into a museum. The only way to break into the museum is through an underwater tunnel, through which only Mark can swim. When he is approached, he refuses. The owner of the carnival is then kidnapped and threatened unless Mark helps.
Atlantis survivor Mark Harris breathes underwater, withstands extreme depth pressures and wields superhuman strength.
Practical Effects
Underwater filming in actual pools with visible bubbles and wobbling sets.
Costume
Mark's iconic swim trunks and webbed fingers — fashion icon, honestly.
Acting
Patrick Duffy commits 1000% to swimming motions on dry land.
Creator
Mayo Simon
Trivia, insights & behind the scenes
Patrick Duffy performed many of his own underwater stunts and later said the gills makeup took three hours daily.
This was NBC's attempt to cash in on the Planet of the Apes TV craze and underwater Bond films — it failed spectacularly but became cult canon.
US
