

Where to Watch Season 1
13 Episodes
- Melt DownE1
Melt DownWater levels are rising all over the Earth. Mr. Schubert offers to stop the disaster in exchange for Mark Harris, but it's the villain himself who is melting the world's ice caps with microwaves. Schubert agrees to stop the melt down if Mark will stay on of his own free will as a test subject, though his true plan is to flood the world and repopulate it with a new species of water-breathing men. - The Hawk of MuE3
The Hawk of MuMark, 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. - Crystal Water, Sudden DeathE7
Crystal Water, Sudden DeathSchubert 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. - ImpE11
ImpAn 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. - The SirenE12
The SirenWhile 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. - Deadly CarnivalE13
Deadly CarnivalMark 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.