Patrick Duffy starred as Atlantean hero Mark Harris in four made-for-TV movies that aired in 1977, prior to the debut of the weekly series. While investigating the disappearance of three scuba divers, Harris encounters a pair of extra terrestrials heralding an impending invasion, in "The Death Scouts." With Belinda Montgomery, Kenneth Tigar. Next, hundreds of alien spores take over Harris' body in an effort to find a way home, unaware that their new host can only survive out of the water for afew hours, in "The Killer Spores." Montgomery, Tigar, Alan Fudge co-star. And, "The Disappearances" finds Harris' friend and colleague Dr. Elizabeth Merrill (Montgomery) abducted by a crazed scientist who needs her help on a secret project. Fudge, Tigar, Darleen Carr also star. Two-disc set also includes the pilot movie, "Man from Atlantis." 6 hrs. total. Standard; Soundtrack: English Dolby Digital mono.