As the Seaview conducts a marine census, Captain Crane spots a mermaid. He brings her aboard and falls under her spell. A sea creature follows the mermaid and proceeds to…

The Seaview is on a top secret mission to transport a 3,000 year old sarcophagus from New York to a country in the Middle East. The United States hopes that…

The Seaview takes on a skeleton crew and is being used to guide a new interstellar space probe. However, Chip Morton is taken over by an alien shadow man which…

While racing to help a foundering research vessel, the Seaview’s nuclear reactor goes critical. Admiral Nelson’s right hand is exposed to intense radiation as he fixes the problem, causing a…

The Seaview is called in to help track an artificially created life form, now loose in the Pacific. The creature, which is growing at a fantastic rate, has its own…

As World War II draws to a close, a secret underwater Nazi base is damaged during a sea battle. A Nazi scientist and his aide are accidently put in suspended…

Arctic Listening Station XZ-5 receives a message from a voice from space (“”laser beeeeeam””). Professor Bergstrom, ignoring the advice of his assistant, activates their beam and brings the alien, living…

Faceless aliens invade Earth and try to take over an underwater atomic base. The leader takes the form of an old, deseased friend of Admiral Nelson in order to convice…

A ghostly ancestor of Admiral Nelson visits him aboard Seaview.

Twin scientists – one good, one evil – come aboard Seaview. The evil twin is out to create a radioactive “plant man.”

Seaview and an enemy sub battle to recover a superbomb from the ocean floor.

A UFO crashes and an alien assumes the form of Admiral Nelson.

Captain Crane rescues a diver from a wrecked atomic sub. He turns out to be Kowalski’s brother, Stan, a Navy diving specialist. When the Seaview needs his help in getting…

Bainbridge Wells is filming a segment of his “Science On The Move” television series on a small island off the coast of Chile. A sea creature comes ashore and kills…

Admiral Nelson and Captain Crane are involved in a mind-control experiment, with Chief Sharkey caught in the middle.

Two scientists examining a radioactive volcano are attacked by a wolf. One dies, and the survivor is infected by a virus that causes him to change from man to werewolf…

As Admiral Nelson demonstrates a new tracking device for a visiting U.S. senator, it seems to show that Seaview is the only life left on earth.

Captain Crane searches for a lost diving bell containing Admiral Nelson, Chief Sharkey, and Dr. Sprague.

Seaview is investigating a UFO. Along the way, they pick up a shipwrecked old man — almost always a bad omen when our gallant crew finds a castaway! The bedraggled…

Seaview is investigating a thousand-mile wide communication blackout. The source of this is a large alien brain found under the sea. It is broght aboard and takes over visiting scientist,…

With Admiral Nelson away, his old friend Admiral Park takes over Seaview’s current mission. Dr. Borgman is conducting experiments, and Park suspects he is up to no good.

Drs. Paul Ward and Peter Omir have discovered a powerful new element — Subterranium 116. This element can produce limitless pure energy, but Omir may have another agenda.

Captain Krueger returns to compel Nelson to shoot Crane. Once that is done, Krueger takes over Crane’s body and searches out a host for Lani, Krueger’s dead lover, so the…

Dr. Alex Holden is hunting a gigantic whale in which he has injected an experimental growth serum. It turns and destroys his boat, killing his crew. He is rescued by…

A 16th century pirate seemingly comes back from the grave to threaten Seaview.

Things go wrong when Nelson and Crane test out a new automated system for Seaview.

Captain Gantt, an ego-maniacal scientist, is in a nuclear sub testing a powerful new fuel. Due to his bungling, the sub crashes into a giant web and is attacked by…

Seaview encounters a sunken WWI sub…with someone still left aboard.

Cruising for days under the ice, Seaview surfaces to find the sky is ablaze thanks to the Van Allen belt catching fire. Nelson races to Washington to confer with fellow…

A scientist and his secretary come aboard Seaview when their research vessel is sunk by a giant Portugese Man-Of-War. They want Admiral Nelson to return to the scene, but won’t…

A space probe returns to earth and is recovered by Seaview…only to unleash an alien organism aboard.

A submerged domed island is forced to the surface by its volcano and exposes a Jurassic-style world.

A foreign power is salvaging sunken nuke missiles from the ocean floor to make themselves a superpower.

Seaview rescues two men adrift at sea, only to discover they are escaped prisoners intent on not returning to prison. While they attempt to hijack the sub, an undersea creature…

Defecting scientists create a proton bomb, but are killed by a foriegn power and the bomb is captured. A surviving scientist works at disarming the bomb…with other plans in mind.

Asian powers attempt to interfere with the American Space Program.

A toy manufacturer is involved with kidnapping and shipping politicians and scientists to foreign powers.

A missile defense platform-drone malfunctions and threatens to destroy the East Coast of the US.

Crane is caught up with a circle of spies as he tries to make his way back to Seaview with important missile defense data.

Nelson works on finding an assassin before he can kill the new Secretary of State.