The 11th episode of the science fiction series Man From Atlantis airs on NBC, starring Patrick Duffy and Belinda J. Montgomery. Pat Morita (The Karate Kid) guest stars. 
A strange, playful imp boards the Navy’s Triton 1 undersea research station, and everyone with whom he comes into physical contact reverts to a childlike state of mind. By the time Mark reaches Triton 1, only one crewmember is left alive, and he is taken back to shore via the Cetacean. But Moby has followed the Cetacean back to its base, and proceeds to reduce the crew and staff there to mental children. Only Mark is immune, with Moby keeping him at arm’s length because Mark is a “down there person” instead of an “up there person”. Moby wants to see more of the surface and its inhabitants and to bring them joy. Moby especially wants to visit a remarkable place he has heard of, known as the Pentagon. Only Mark is left to stop him.
written by Shimon Wincelberg
directed by Paul Krasny
music by Fred Karlin
Cast: Patrick Duffy (Mark Harris), Belinda J. Montgomery (Dr. Elizabeth Merrill), Alan Fudge (C.W. Crawford), Dick Gautier (Duke), Pat Morita (Moby), James Ingersoll (Triton Officer), Mel Scott (Davis), Lyman Ward (Clavius), Larry Breeding (O’Toole), William Benedict (Guard), Harvey J. Goldenberg (Man), Allen Joseph (Shop Owner), Richard Laurance Williams (Jomo), J. Victor Lopez (Chuey), Jean Marie Hon (Jane), Anson Downes (Allen)
Notes: This is the final appearance of series regular Belinda J. Montgomery; the character of Dr. Merrill is not seen in the two remaining episodes of the series, but is mentioned in dialogue in the next episode. An attempt was made to create a replacement character in the following episode, but the series’ time had run out, and star Patrick Duffy was already auditioning for a role in an upcoming prime time drama, Dallas. This also marks the final Man From Atlantis appearance of Cetacean crew background regulars Jean Marie Hon and Anson Downes.
LogBook entry by Earl Green