Join or Sign In
Sign in to customize your TV listings
By joining TV Guide, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.
38 Episodes 1961 - 1961
Episode 1
Sat, Jan 7, 196130 mins
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.

Episode 2
Sat, Jan 14, 196130 mins
While in a South American jungle, Mike tangles with a jealous treasure hunter.

Episode 3
Sat, Jan 21, 196130 mins
Mike investigates the mysterious collision of two Navy destroyers.

Episode 4
Sat, Jan 28, 196130 mins
Mike's normally level-headed skindiving buddy begins to exhibit peculiar behavior.

Episode 5
Sat, Feb 4, 196130 mins
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.
Episode 6
Sat, Feb 11, 196130 mins
Mike tries to recover valuable medical supplies that an Asiatic warlord has dumped into the river.
Episode 7
Sat, Feb 18, 196130 mins
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.
Episode 8
Sat, Feb 25, 196130 mins
Mike risks his life in order to sneak badly needed medical supplies through a dictator's mine-infested blockade.

Episode 9
Sat, Mar 4, 196130 mins
Problems arise as Mike attempts to retrieve a pair of radioactive cylinders leaking dangerous amounts of radiation underwater.

Episode 10
Sat, Mar 11, 196130 mins
Using sonar equipment on his boat, Mike tracks heroin smugglers.

Episode 11
Sat, Mar 18, 196130 mins
Mike travels to Mexico in search of underwater fossils in an inaccessible cave.

Episode 12
Sat, Mar 25, 196130 mins
Mike takes part in a special program known as Operation Astronette. His job is to train three female astronauts in underwater survival skills.

Episode 13
Sat, Apr 1, 196130 mins
Mike attempts to salvage a survival kit from a German fighter plane shot down during World War II.
Episode 14
Sat, Apr 8, 196130 mins
Professor Halliday wants more money to carry on his underwater exploration.

Episode 15
Sat, Apr 15, 196130 mins
An inventor dies while testing a new underwater detection device.

Episode 16
Sat, Apr 22, 196130 mins
Mike tells an inept skin-diving pupil that there's no point in continuing his lessons.

Episode 17
Sat, Apr 29, 196130 mins
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.
Episode 18
Sat, May 6, 196130 mins
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.
Episode 19
Sat, May 13, 196130 mins
Mike and his partner fight the bends, as they endure a long recovery process in a submarine's escape trunk.
Episode 20
Sat, May 20, 196130 mins
Mike and his diving team are attacked by a violent new breed of octopus.
Episode 21
Sat, May 27, 196130 mins
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.
Episode 22
Sat, Jun 3, 196130 mins
While on a covert mission for the U.S. Government, Mike discovers a few unsavory inhabitants on what was supposedly a deserted island.
Episode 23
Sat, Jun 10, 196130 mins
While in the dangerous jungles of Ecuador, Mike takes desperate measures to save the life of his very ill infant godson.
Episode 24
Sat, Jun 17, 196130 mins
Mike travels undercover to the Caribbean Coast on a secret mission for the United States Government.
Episode 25
Sat, Jun 24, 196130 mins
It's a battle of wits, as Mike tries to outsmart pirates intent on hijacking the cargo of a sunken wreck that he found.

Episode 26
Sat, Jul 1, 196130 mins
Mike is recruited to track down counterfeiters.

Episode 27
Sat, Jul 8, 196130 mins
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.
Episode 28
Sat, Jul 15, 196130 mins
After being falsely arrested for diving in a bay, Mike sets out to solve a murder mystery.
Episode 29
Sat, Jul 22, 196130 mins
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.
Episode 30
Sat, Jul 29, 196130 mins
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.

Episode 31
Sat, Aug 5, 196130 mins
Mike is suspected of insurance fraud, after an impostor steals a valuable necklace.

Episode 32
Sat, Aug 12, 196130 mins
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.

Episode 33
Sat, Aug 19, 196130 mins
A South American city's water supply is threatened by a drum of poison from an overturned truck.
Episode 34
Sat, Aug 26, 196130 mins
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.

Episode 35
Sat, Sep 2, 196130 mins
Mike battles underwater saboteurs, as he assists the US Navy with underwater sound travel experiments.
Episode 36
Sat, Sep 9, 196130 mins
Mike investigates the ramming of a Coast Guard boat by a hydroplane piloted by a friend of his during a race.

Episode 37
Sat, Sep 16, 196130 mins
Mike Nelson sets out to prove that the death at sea of a friend's father was the result of murder.
Episode 38
Sat, Sep 23, 196130 mins
Underwater explosives threaten to make this Mike Nelson's final dive.