This exciting 1977-78 sci-fi series chronicled the ongoing adventures of Mark Harris (Patrick Duffy), a man with webbed hands and feet believed to be the lone survivor of the lost undersea city Atlantis. Mark used his extraordinary gifts─including underwater breathing, tolerance to crushing ocean depths, and superhuman strength─to aid the Foundation for Oceanic Research onboard the submarine Cetacean. Belinda Montgomery, Alan Fudge co-starred. All 13 episodes of the series─including "Melt Down," "The Hawk of Mu," "The Naked Montague," "Imp," and "Deadly Carnival"─are collected in a four-disc set. 10 1/2 hrs. total. Standard; Soundtrack: English Dolby Digital mono. 13 episodes on 4 discs. 10 1/2 hrs.