Patrick Duffy
Mark Harris
Series SeasonSeason 1 episodes1977
Man from Atlantis
Season 1
No season overview available.
Episodes
Each episode has its own detail page.
Episode 149 min1977-09-22
Melt Down
Schubert threatens to cause worldwide flooding by using powerful microwaves to melt Earth's polar ice caps, unless the government turns Mark Harris over to him.
Episode 249 min1977-10-13
The Mudworm
When a multimillion-dollar underwater probe malfunctions and begins attacking any ship that travels near it, Mark must reason with its highly advanced brain and convince it to stop.
Episode 348 min1977-10-18
The Hawk of Mu
Mark, investigating a power outage, discovers a centuries-old hawk statue from the legendary civilization of Mu. The statue, when used properly, can remove the power from a large area. Schubert discovers the power of the hawk statue and Mark must prevent him from taking it.
Episode 448 min1977-10-25
Giant
The oceans are leaking through a fissure in the ocean floor. A con-man named Muldoon agrees to guide Mark through the fissure to investigate. However, Mark is unaware either that giants inhabit the other side of the fissure or that Muldoon has already stolen gold from one of them.
Episode 548 min1977-11-01
Man O' War
Using his genetic scientists, Schubert produces a giant jellyfish which he intends to release unless his extortion demands are met.
Episode 648 min1977-11-08
Shoot-Out at Land's End
Mark is somehow linked with a man named Billy, existing in a wild west town, who appears to be his twin. Investigating, Mark arrives in the town and discovers that Billy once had the same webbing as Mark, but also that he has had it removed.
Episode 748 min1977-11-22
Crystal Water, Sudden Death
Schubert attempts to make a satellite weapon to knock out Earth's communications. However, to power the weapon, he needs the energy crystals protected by a force field under the ocean. The crystals actually power the force field that protects an underwater world inhabited by a humanoid society.
Episode 848 min1977-12-06
The Naked Montague
An underwater landslide transports Mark to Verona, Italy...in the days of Romeo and Juliet.
Episode 948 min1977-12-13
C.W. Hyde
C. W. develops a Jekyll-and-Hyde personality after swallowing a mysterious liquid.
Episode 1048 min1978-04-18
Scavenger Hunt
Mark re-encounters Muldoon, his nemesis from "Giant," who is using a sea monster to make island natives sacrifice young girls to him.
Episode 1148 min1978-04-25
Imp
An impish little man enters an underwater station and causes the crew to become irrational simply by touching them. After three crewmen die, the F.F.O.R. hears Duke, the last crewman, talking over the radio in a childish manner and investigates. Mark swims over and brings Duke over to the Cetacean, not knowing the imp has stowed aboard.
Episode 1290 min1978-05-02
The Siren
While investigating the mysterious loss of three ships in one part of the ocean, Mark and the crew of the Cetacean encounter a submarine operated by a modern-day pirate. The pirate has captured a mermaid that can produce a hypnotic siren song, which mesmerizes anyone who hears it, even Mark.
Episode 1390 min1978-06-06
Deadly Carnival
Mark goes undercover to investigate members of a carnival planning to break into a museum. The only way to break into the museum is through an underwater tunnel, through which only Mark can swim. When he is approached, he refuses. The owner of the carnival is then kidnapped and threatened unless Mark helps.