Episode List
Season 4
Jan. 7, 1961
Point of No Return
As part of a research project, Mike Nelson attempts to spend three days underwater at a depth of 250 feet in a pressure chamber dubbed Scubasphere. A tropical storm pops up, and both the cable and telephone connections attached to the Coast Guard ship above are severed. To make matters worse, the ship heads for safer waters without realizing that Mike has lost his connection to them.
Jan. 14, 1961
River Treasure
While in a South American jungle, Mike tangles with a jealous treasure hunter.
Jan. 28, 1961
Vital Error
Mike's normally level-headed skindiving buddy begins to exhibit peculiar behavior.
Feb. 4, 1961
The Dancer
Mike desperately tries to save the life and limb of a popular dancer whose leg is hopelessly pinned in wreckage 90 feet below the surface.
Feb. 11, 1961
Sperling of Lamatsue
Mike tries to recover valuable medical supplies that an Asiatic warlord has dumped into the river.
Feb. 18, 1961
Rescue
Mike must dive to rescue a friend trapped in a sunken wreck, with just minutes left until explosive charges are set to blow it to pieces.
Feb. 25, 1961
Mercy Ship
Mike risks his life in order to sneak badly needed medical supplies through a dictator's mine-infested blockade.
Mar. 4, 1961
Hot Tracer
Problems arise as Mike attempts to retrieve a pair of radioactive cylinders leaking dangerous amounts of radiation underwater.
Mar. 25, 1961
The Aquanettes
Mike takes part in a special program known as Operation Astronette. His job is to train three female astronauts in underwater survival skills.
Apr. 1, 1961
Survival Kit
Mike attempts to salvage a survival kit from a German fighter plane shot down during World War II.
Apr. 22, 1961
The Defector
Mike tells an inept skin-diving pupil that there's no point in continuing his lessons.
Apr. 29, 1961
Niko
Mike attempts to diffuse two sunken torpedoes, as well as diffusing the racial tensions between the Japanese and American members of his 3-man team.
May 6, 1961
Cougar
Mike and a young man, whom he had helped rehabilitate when he was a juvenile delinquent, fly to Hawaii to hunt for lionfish, one of the most venomous fish on the ocean floor.
May 13, 1961
Sub Hatch
Mike and his partner fight the bends, as they endure a long recovery process in a submarine's escape trunk.
May 20, 1961
The Octopus Story
Mike and his diving team are attacked by a violent new breed of octopus.
May 27, 1961
Quicksand
While searching for a sunken wreck, Mike's hard hat diving partner disappears, leaving nothing behind but his torn air hose attached to their boat on the surface.
Jun. 3, 1961
Lost Island
While on a covert mission for the U.S. Government, Mike discovers a few unsavory inhabitants on what was supposedly a deserted island.
Jun. 10, 1961
Baby
While in the dangerous jungles of Ecuador, Mike takes desperate measures to save the life of his very ill infant godson.
Jun. 17, 1961
Confidential Mission
Mike travels undercover to the Caribbean Coast on a secret mission for the United States Government.
Jun. 24, 1961
Underwater Pirates
It's a battle of wits, as Mike tries to outsmart pirates intent on hijacking the cargo of a sunken wreck that he found.
Jul. 8, 1961
Dark Evil
While Mike is in Nassau on a salvage job, two of his friends catch and eat a strangely poisonous fish for breakfast, which causes severe hallucinations that trigger suicidal and homicidal tendencies.
Jul. 15, 1961
Sunken Car
After being falsely arrested for diving in a bay, Mike sets out to solve a murder mystery.
Jul. 22, 1961
Hit and Run
A female diving friend of Mike's is hospitalized with severe injuries sustained by a hit-and-run speedboat piloted by a popular movie star.
Jul. 29, 1961
The Saint Story
Mike is recruited to rescue the statue of a Saint who falls off a ship into the sea. The locals believe this is the cause of many problems in the area including the poor fishing.
Aug. 5, 1961
Imposter
Mike is suspected of insurance fraud, after an impostor steals a valuable necklace.
Aug. 12, 1961
Superman
Mike is invited to join a longtime friend and her workaholic husband on their expedition to explore an Aztec ceremonial pool on an uninhabited island located 15 miles off the coast of Mexico. Mike's friend unwittingly puts her husband's life in jeopardy, when she deliberately strands the trio on the island.
Aug. 19, 1961
Roustabout
A South American city's water supply is threatened by a drum of poison from an overturned truck.
Aug. 26, 1961
P.T. Boat
While vacationing in Nassau, Bahamas, Mike meets an eccentric multi-millionaire inventor and his sister. He helps the man experiment with an underwater remote control device used to guide boats.
Sep. 2, 1961
Starting Signal
Mike battles underwater saboteurs, as he assists the US Navy with underwater sound travel experiments.
Sep. 9, 1961
Skipper
Mike investigates the ramming of a Coast Guard boat by a hydroplane piloted by a friend of his during a race.
Sep. 16, 1961
Crime at Sea
Mike Nelson sets out to prove that the death at sea of a friend's father was the result of murder.
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