'Beyond the Beyond' by Mayo Simon

When the unconscious form of a mysterious man is found washed ashore after a terrible storm at sea, the staff of the nearby Naval Undersea Centre take him to their base for treatment. Here the attractive Doctor Elizabeth Merrill is astonished to find that not only does the handsome amnesiac have webbed hands and feet, but also gills instead of lungs, which enable him to breathe both on land and in water. Having given the aquatic stranger the name of ‘Mark Harris’, Elizabeth soon determines that he can swim faster than a dolphin, endure the pressure of incredible depths, and emit an ear-splitting sonar wave. Believing that Mark could be the sole survivor of the mythical undersea city of Atlantis, the Foundation of Ocean Research offers him the chance to join their team, in return for help in determining the fate of his people. Mark’s first mission is to help locate a missing submarine, which was carrying a group of top military officials. Diving to the ocean floor, Mark discovers an undersea base owned by megalomaniac Mr. Schubert – a mad scientist who plans to use mind control to destroy all the nations of the world using their own nuclear weapons…

Patrick Duffy (Mark Harris), Belinda Montgomery (Doctor Elizabeth Merrill), Dean Santoro (Ernie Smith), Art Lund (Admiral Dewey Pierce), Victor Buono (Mr. Schubert), Lawrence Pressman (Commander Phil Roth), Mark Jenkins (Lieutenant Ainsley), Steve Franken (Doctor), Joshua Bryant (Doctor Doug Berkley), Allen Case (Lieutenant Commander Johnson), Virginia Gregg (Whale Scientist), Curt Lowens (Emil), Charles Davis (British Scientist), Lilyan Chauvin (French Scientist), Vincent Milana (American Scientist), Alex Rodine (Russian Scientist), Philip Baker Hall (George), Marguerite LeLain (First Receptionist), Trudy Marshall (Woman at Party), Michael J. London (Popeye), Robert Dore (Diver), Connie Izay (First Nurse), Judd Laurance (Intern), Jim Chandler (Man on Beach), Patricia Anderson (Second Receptionist), Akemi Kikumura (Third Receptionist), Larry Holt (Ambulance Driver), Peter Weiss (Test Lab Assistant), Robert Phalen (Habitat Technician), Maralyn Thoma (Second Nurse), Phillip Rowe (Intern), Cheryl Robinson (X-Ray Technician), Scott Stevenson (Boy on Beach), Philip Tanzini (Boy at Phone Booth)

Directed by Lee H. Katzin
Produced by Herman Miller

Executive Producer Herbert F. Solow

TX (US): 4th March 1977

Notes:
*Introducing Mark Harris and Doctor Elizabeth Merrill