Patrick Duffy ............................................ Mark Harris
Belinda J. Montgomery .......................... Dr. Elizabeth Merrill
Ep:
Man From Atlantis
Cast: Dean Santoro (Ernie Smith), Art Lund (Admiral Dewey Pierce), Victor Buono (Mr. Schuburt), Lawrence Pressman (Commander Phil Roth), Mark Jenkins (Lieutenant Ainsley), Allen Case (Lieutenant Commander Johnson), Joshua Bryant (Dr. Doug Berkley), Steve Franken (Doctor), 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 DeLain (First Receptionist), Trudy Marshall (Woman at Party), Michael J. London (Popeye), Robert Dore (Diver), Michael Watson (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 Technician), Maralyn Thuma (Second Nurse), Phillip Roye (Intern), Cheryl Robinson (X-Ray Technician), Scott Stevenson (Boy on Beach), Philip Tanzini (Boy at Phone Booth), Robert Phalen (Habitat Technician)
Written By: Mayo Simon
Directed By: Lee H. Katzin
Ep:
The Death Scouts
Cast: Kenneth Tigar (Dr. Miller Simon), Tiffany Bolling (Lioa / Dilly), Burr DeBenning (Xos / Chazz), Annette Cardona (Ginny Mendoza), Alan Mandell (Grant Stockwood), Vincent Deadrick (Herb Wayland)
Written By: Robert Lewin
Directed By: Marc Daniels
Ep:
Killer Spores
Cast: Kenneth Tigar (Dr. Miller Simon), Ivan Bonar (Edwin Shirley), Fred Beir (Sub Captain), James B. Sikking (Colonel Manzone)
Written By: John D.F. Black
Directed By: Reza Badiyi
Ep:
The Disappearances
Cast: Kenneth Tigar (Dr. Miller Simon), Darleen Carr (Dr. Mary Smith), Pamela Peters Solow (Jane Smith), Dennis Redfield (Dick Redstone), Ivor Francis (Dr. Medlow), Fred Beir (Sub Captain)
