TV Rating: TV-G: A famous newsman, convinced that he has a fatal illness, tries to end his life in such a way that his wife can collect his insurance, with Mike as a witness.
TV Rating: TV-G: Mike responds to a "man overboard" situation, but an extensive search turns up no victim.
TV Rating: TV-G: Mike finds that someone has tapped the underwater cable used in monitoring a televised missile test.
TV Rating: TV-G: One salvage diver disappears while diving on a sunken yacht off the coast of Yucatan, and Mike tries to see that two others don't share his fate.
TV Rating: TV-G: Mike uses an underwater TV camera setup to nab thieves who are robbing a Hawaiian girl's pearl beds.
TV Rating: TV-G: A dock fire is rapidly approaching a warehouse for a chemical company, which has an explosive 30 time more powerful by weight than TNT and they have half a ton of it. One man is already dead trying to reach the chemicals, which can be made safe with by getting it soaking wet. Mike risks his life to save a sizable part of town and the lives of thousands of men, women, and children. The fire chief thinks Mike is their only hope, as the only approach seems to be underwater and up through a pipe that goes to the warehouse.moreless
TV Rating: TV-G: Mike is trapped in a "scubasphere" when the cable attached to it snaps.
TV Rating: TV-G: A sunken truck points Mike to the murder of a political boss, and the killer is the father of a good friend of Mike's.
TV Rating: TV-G: A coastal fisherman wages a private war against kelp harvesters, blaming them for ruining the fishing grounds necessary to his livelihood.
TV Rating: TV-G: Mike and a group of astronauts-in-training are stranded on the seabed when a hurricane blows their boat away.
TV Rating: TV-G: Mike stands by to assist an undercover man in his assignment to infiltrate an illegal alien-smuggling ring.
TV-Rating: TV-G: Mike straightens out a pair of teenagers who poisoned a shark Mike had captured for Marineland.
TV-Rating: TV-G: When Mike is called upon to teach scuba diving to his former mentor who trained him in helmet diving, he finds that the older man is not physically up to it.
TV Rating: TV-G: A man bribes Mike to continue giving lessons to an inept diving student whom he's stopped teaching.
TV Rating: TV-G: Mike goes after an egocentric movie star who critically injures a female friend and co-worker of his in a hit-and-fun speedboat accident. Her injuries may require the doctors to remove her leg, arm, or she might even die.
TV Rating: TV-G: Mike investigates the mysterious death of the featured performer in a water ski show during the act's underwater finale.
TV Rating: TV-G: A heroic test pilot from the Korean War has his mettle tested when he must spend 24 hours with Mike in a makeshift decompression chamber after a dive to prevent the bends from killing him.
The police ask Mike for his thoughts on a man whose wife didn't resurface after photographing a shipwreck. The husband says she simply went deeper than she could handle. Examining the couple's photos, Mike realizes the man''s lying. To get a confession, Mike fools him into believing they can retrieve her body from 500 feet down.moreless
TV Rating: TV-G: Mike has to fight one of his heroes, when working with the US Coast Guard on a scientific and military test of underwater sound. The US Navy and the US Coast Guard believe underwater speaking tubes exist and are testing between the India Ocean and the Caribbean. Unfortunately, one such tube comes out close to a nation hostile to the USA. The local naval commander accuses Mike and the Coast Guard of spying and tries to stop them and enlists the help of a world famous marine scientist and hero to Mike Nelson.moreless
TV Rating: TV-G: Unaware that two of his treasure-hunting friends are trapped inside, Mike sets charges to blow up a sunken ship that is a menace to a busy shipping lane.
TV Rating: TV-G: Mike attempts to deal a blow to organized crime by using a periscope camera to photograph a secret meeting of mob bosses at a lakeside estate.
TV-Rating: TV-G: Scientists risk triggering a tidal wave when they ignore Mike's warnings about the strength of the explosive charges they're using.
TV-Rating: TV-G: Mike discovers the wreck of a navy ship that disappeared mysteriously, and is joined by a pair of its former crew members when he dives to examine it.
When a casino robbery gone wrong intersects with two of Mike's former students (a doctor and his wife), it means Mike is again in a dangerous and life threatening situation. Can Mike save himself and his two former students?
TV Rating: TV-G: After jewelery from a sunken yacht and two dead divers appear, the police ask Mike to investigate this possible case of murder.
TV Rating: TV-G: A scientific society hires Mike to obtain fossil samples from a newly-discovered underwater cavern for the purpose of authentication. It becomes clear someone is trying to commit a fraud. Mike risks his life to discover who it is trying either to discredit a paleontologist or put one over on the scientific world.moreless
TV Rating: TV-G: A young skin diver goes missing and as Mike starts finding clues to his fate, the District Attorney goes after a man Mike feels is innocent of the charges. It is up to Mike to find out the truth and help free a man held on suspicion of murder.moreless
After Mike turns down an offer to work with a pair of men who run a deep sea salvage company because of their past, Mike's assistant on his current job agrees to work for them. Mike joins the three men on a treasure hunt for gold, as Mike wants to keep his former young assistant safe from harm.moreless
TV Rating: TV-G: Mike helps test a remote control guidance device invented by a rich eccentric.
TV Rating: TV-G: Pirates try to snatch a sunken freighter away from Mike before he can salvage it for an old Navy buddy.
Mike dives to see how a woman escapes from a locked truck at the bottom of a lake. Watching a near-tragedy underwater, he takes his concerns to Harry Baldwin, the head of the carnival show. The girl's life is placed in serious danger when Harry sabotages the trick in revenge for her falling in love with another man.moreless
While looking for a rare fish in the West Indies, the US Government loses the nose cone of a test ICBM missile. Can Mike find and recovery it before enemy agents find it or him?
TV Rating: TV-G: A man planning to murder his wife hires Mike to teach her to scuba dive so that he may lure her into a dangerous underwater current.
TV Rating: TV-G: A restless youth and a college girl complicate Mike's attempts at capturing a poisonous lionfish.
TV Rating: TV-G: While working for the U.S. Treasury to break a counterfeiting ring, Mike intercedes in a kidnapping.
TV Rating: TV-G: The Immigration Department contacts Mike after he rescues a young woman from the ocean. Officials believe she is involved in smuggling foreign criminals into the states. After having her released into his custody, the tables are turned and Mike finds himself being held by the woman and her brother. They want to keep Nelson quiet until their other brother has safely slipped into the country.moreless
TV Rating: TV-G: Mike must find and disarm a torpedo that's been sent into the outflow tube of a hydro-electric plant.
TV Rating: TV-G: Mike dives onto a sunken freighter loaded with nitro, planning to detonate the cargo before it drifts away into the shipping lanes.
TV Rating: TV-G: Mike uses sonar to foil a gang of underwater heroin smugglers.
TV Rating: TV-G: Mike is hired by a local German consul to salvage a survival kit from the wreckage of a Nazi warplane in the Caribbean.
TV Rating: TV-G: Mike, working with a pretty Secret Service agent, poses as a scientist in order to retrieve a cache of counterfeit currency from a crashed Nazi plane off the coast of a Caribbean republic.
TV Rating: TV-G: Mike finds himself with a free day (at least job wise). This gives him a choice between needed underwater work on his boat or joining his friend, Dick Talbot, on Catalina Island. While Mike chooses work over the blonds and fun, two men offer (at gun point) Mike a job he simply can't refuse. They want him to retrieve a sunken package, which Mike suspects is narcotics. Mike realizes once he gives them the "junk," they'll kill him. How can Mike save himself?moreless
TV Rating: TV-G: An overconfident swimming champion endangers both herself and Mike when she challenges him to an underwater race to Catalina.
TV Rating: TV-G: While checking the underwater security of a new dam, Mike discovers both a bomb that has been placed in an intake valve and a conspiracy that ends a best friend friendship.
TV-Rating: TV-G: While marking underwater sites for demolition by a construction company, Mike learns that a young boy is trapped in a submerged grotto that has already been mined with an explosive.
TV Rating: TV-G: Mike helps the daughter of his old UDT Commander investigate the man's death, which she believes was murder.
TV Rating: TV-G: Mike poses as a tourist on vacation as he tries to locate a hidden underwater missile launcher in the Caribbean.
TV Rating: TV-G: Mike comes to the rescue of a scuba diver who has been trapped in a kelp bed while spear fishing.
TV Rating: TV-G: A husband and wife team steal and then ransom some computer tapes necessary to a plant's operations. A clue tells Mike that the culprits are members of a dive club.
TV-Rating: TV-G: An East Indian oceanographer vanishes during a series of underwater experiments with infra-red light.
TV Rating: TV-G: Mike must get past Jivaro Indians who are blocking his passage downriver as he attempts to get a young missionary's baby to a hospital for medical attention.
A mining company flies Mike 1,500 miles inland to survey a collapsed and partly flooded mine. They're trying to decide the best way to reopen the mine. During his first dive, Mike hears noises that lead him to an air pocket where two men barely are surviving. One of the miners feels there is only enough air left in the cave for 10, maybe 20 minutes. Mike has only enough air to take one of the miners out. Who will go with Mike? Who stays and hopes (with only one miner breathing the air) he'll be able to survive until Mike returns? How will they decide who lives and who risks death?moreless
TV-Rating: TV-G: A group of radicals in a small South American country have rigged a sunken munitions ship with 50 tons of dynamite. Mike must disarm the detonators before the explosion destroys the nation's harbor and capital city.
TV Rating: TV-G: Mike and a fellow American butt heads with one another, when a truck accident dumps poison and debris on top of Mike's assistant. Making this even more critical is the location - the water supply reservoir of a South American city.
TV-Rating: TV-G: Mike is hired by the leader of a small Latin country to train a pair of underwater demolition experts. When the president is kidnapped by a political opponent, Mike and his men are recruited to rescue the president from the island fortress where he's being held. Mike faces additional dangers because one of hiss men is working for the kidnapper.moreless
TV Rating: TV-G: A pretty woman and her father, vacationing in the Bahamas, become killers after inadvertently eating a variety of fish that causes hallucinations.
While working on a project to formulate a safety code for skin divers, Mike meets up with an old flame who has her own safety issues while skin diving. She is trying to combine skin diving with her job as a photographer, but needs a portfolio and wants Mike's help in shooting a sunken barge off the coast of Mexico. Her impatience brings both Mike and her to the brink of death.moreless
TV Rating: TV-G: Mike finds high radiation coming from the hull of a foreign freighter, but when the Coast Guard investigates, they find no trace of the radioactivity.
TV Rating: TV-G: Mike discovers a plant growing profusely on the ocean floor that turns out to be a hybrid cannabis, and he is speared when he investigates further.
TV Rating: TV-G: Mike convinces a reluctant daughter to continue her father's work after he is killed testing an underwater electrical detection device.
TV Rating: TV-G: Mike investigates the source of a radar jamming signal that caused two ships to collide.
Diving for sponges off of Florida, Mike hears bells as a fierce current tries to force him into a cave. He barely escapes death, but learns many other divers have met their demise after being lured in by an evil mermaid. Obsessed with solving the mystery, Mike is determined to dive again.moreless
TV Rating: TV-G: During hydroplane races, a friend of Mike's rams his craft into a Coast Guard ship, leaving Mike to investigate.
A radioactive knife and fish convince a pair of prospectors there's uranium underwater. They bring in Mike to scour the seabed with a Geiger counter and find the deposit. Rather than celebrating, one of the men becomes suspicious of his partner and Mike, convinced they're plotting to steal his claim.
TV-Rating: TV-G: While diving in Lake Ontario, Mike is sent by the Coast Guard to investigate an item that crashed into the lake nearby, which may be an enemy ICBM.
TV Rating: TV-G: Mike races foreign agents to a missile fired from Central Asia in order to photograph it on the sea bottom and obtain its data recorder.
TV Rating: TV-G: Mike heads a three-man team in an effort to disarm a pair of unexploded torpedoes at the bototm of a West Coast harbor.
TV Rating: TV-G: A mysterious woman who's hired Mike for private diving lessons proves so inept that, after a week, Mike drops her, fearing she'll accidentally kill herself. Her motivation for the lessons becomes clear when an insurance investigator shows up; her boyfriend is doing time for a jewel heist and the loot is stashed 150 feet down.moreless
TV Rating: TV-G: Mike is sent by the government to investigate a jamming signal affecting a listening station in the Indian Ocean.
TV Rating: TV-G: The Coast Guard asks Mike to investigate the drowning death of a scientist who had invented a new type of rebreather.
TV Rating: TV-G: A husband and wife team of photojournalists ignore Mike's warnings about diving on a sunken ocean liner and are imperiled by the pressures of the deep.
TV Rating: TV-G: Mike discovers a submarine off the Panama coast that is a base of operations for divers planning to destroy the Panama Canal.
TV Rating: TV-G: Mike, while on a job for the Greek government, runs afoul of a local sponge diver. He is trying to protect his discovery of an ancient and valuable statue in an underwater cave. The diver and his girlfriend use English mines disguised to look like WWII Nazi mines to protect their find.moreless
TV Rating: TV-G: While on patrol with the Coast Guard Auxiliary, Mike discovers a deported crime boss trying to re-enter the country, then has to rescue him from some old enemies.
TV Rating: TV-G: Mike tries to outmaneuver a foreign harbormaster as he attempts to retrieve a diplomatic pouch from an airliner that crashed into the sea.
TV Rating: TV-G: Markings on the body of a dead diver convince a marine biologist that a tropical lagoon is inhabited by a killer octopus.
TV Rating: TV-G: A careless salvage diver is trapped on the deck of a sunken freighter by some lead cable.
TV Rating: TV-G: Someone attempts to kill Mike while he's scouting out a site for an underwater marine preserve.
TV Rating: TV-G: While surveying a remote river in the South American jungle, Mike is threatened by the jealousy of a man prospecting for emeralds with his wife.
TV-Rating: TV-G: Mike and an old war buddy use a new, untested rebreather to investigate an underwater missile site being constructed in the channel of a privately-owned island.
TV Rating: TV-G: Mike and a pair of archaeologists risk the anger and booby traps of islanders while exploring underwater caves in the Caribbean.
TV-Rating: TV-G: Mike searches for a vanished oceanographer by retracing her charted course.
TV Rating: TV-G: While looking into the possibility of linking two Latin American lakes by a canal, Mike runs afoul of rebel guerrillas.
TV Rating: TV-G: Mike faces sharks and other unexpected difficulties while working with three pretty women undergoing astronaut training.
TV Rating: TV-G: Mike teams up with a Mexican prison escapee to uncover nefarious activity on an uncharted Pacific atoll off the coast of South America.
TV-Rating: TV-G: In preparation for the visit of a foreign head of state, Mike helps the Coast Guard do a security check on the area.
TV Rating: TV-G: Mike is hired to dive on a sunken freighter in New York Harbor in the hopes that some crew members may still be alive in air pockets.
TV Rating: TV-G: Mike's efforts to retrieve a pair of radioactive cylinders are complicated by the presence of a headstrong youth to whom he's been giving diving lessons.
TV-Rating: TV-G: While helping to test a friend's underwater radio device, Mike discovers a submerged radio beacon, camouflaged and guarded by an electric gun.
TV Rating: TV-G: Mike witnesses a supposed serpent chasing a boat on the Red Sea. He puts on his diving gear and investigates, finding the "serpent" to be a large tube filled with stolen explosive fuel meant for a local missile base. Mike has to act fast to prevent a submarine from making off with the dangerous and valuable cargo from the spies.moreless
TV Rating: TV-G: While on a diving expedition in Guatemala, a woman seeking to slow down her husband's frantic lifestyle deliberately sinks the boat they share, unaware that her husband is a diabetic and his insulin supply will be lost with the vessel.
TV Rating: TV-G: Mike races to recover a ditched nuclear warhead before sea water corrodes the casing.
TV Rating: TV-G: After discovering a sunken Japanese submarine, the amateur skin diver who found it goes violently berserk. Mike follows suit, after resuscitating him and they both wind up in the hospital. Mike returns to the submarine to see if it is leaking nerve gas and if so to try and seal the holes, till the US Navy can properly handle its dangerous cargo.
TV Rating: TV-G: A man tricks a scientist into dropping a top-secret folio overboard, where a confederate can retrieve it.
Mike and a female radiation safety expert work to remove a dangerously radioactive capsule from a sunken ship before it kills them both from its gamma rays.
TV Rating: TV-G: Another movie company using Mike as an adviser needs his help when a planned torpedo blast traps the star and a Hollywood columnist on-board a sinking ship.
TV-Rating: TV-G: Mike goes after a newlywed teenager turned fugitive after a bungled holdup prompts him to hide in the city's storm drain system.
TV Rating: TV-G: Working for the State Department, Mike attempts to rescue a political prisoner in South America by using a harbor city's canal system.
TV-Rating: TV-G: Mike tries to reach a little girl trapped in the air shaft of a mine located at the edge of a man-made lake, but the potential for a landslide hampers his attempt.
TV-Rating: TV-G: While supervising an expedition in the Indian Ocean to find a rare coelacanth fish, Mike finds that the organizer is dangerously eager to impress his fiance.
While on job field testing a new device called a "Dual Sweep Transducer," common name fish-finder, Mike crosses path with a Mexican fishing village without fish, except for one man. Using the ship ("Sonar Queen") equipment, Mike finds the fish and then goes into sale mode to save the fisherman and sell the community on new technology.moreless
TV-Rating: TV-G: Mike helps a friend in the military with his tests of underwater radar equipment.
TV Rating: TV-G: A scuba diving ballerina faces the possibility of underwater amputation when she catches her foot between the buckled plates of a sunken freighter.
TV Rating: TV-G: Mike is recruited to train a pair of divers to rescue a woman from a Communist prison camp.
Mike investigates a sunken freighter for an insurance company and to search for an earlier diver who never resurfaced. The salvage ship operator he hires to transport him wants the wreck all to himself. Not hesitating to kill again, he refills one of the air tanks with deadly carbon monoxide.
TV Rating: TV-G: A young Mexican boy helps Mike locate a safe entrance to an underwater fossil cave.
TV Rating: TV-G: While helping his former history professor search for pirate treasure off the North Carolina coast, Mike finds evidence that the underwater cave said to house the treasure has been tampered with.
TV Rating: TV-G: After being accidentally caught in a fishing net, Mike challenges an Asiatic warlord by trying to retrieve a cache of medical supplies that the dictator has dumped into a river.
TV Rating: TV-G: Latin American revolutionaries recruit Mike to recover the body of their murdered leader from the palace lagoon in order to ignite an uprising.
While Mike is helping a friend test a new mini-submarine, the daughter of a Soviet scientist approaches him about rescuing her Father from behind the Iron Curtain. Mike turns her and the US government agent with her down flat. Later, though, Mike becomes a one man commando team, in the middle of the Pacific Ocean, when he boards an Eastern block ship. One additional issue is no one was able to tell her Father Mike is coming to spirit him to the West.moreless
TV-Rating: TV-G: Mike becomes suspicious when his hired dive on a Spanish galleon yields a rare art treasure.
TV-Rating: TV-G: Mike faces arrows and an alligator in the Mayan jungle while searching for a drug that could be a boon to medicine or a dangerous narcotic.
TV Rating: TV-G: A dead ringer for Mike is stealing diamonds from a sunken sports cruiser, but when Mike is accused of the crime, he is unable to establish an alibi due to his current top-secret mission.
TV Rating: TV-G: A swimsuit designer hires Mike to do an underwater fashion shoot, but corporate espionage interferes with the job.
TV Rating: TV-G: As consultant on a remake of The Count of Monte Cristo, Mike finds that the emotions of the star and his stand-in may lead to disaster in the execution of a stunt.
TV-Rating: TV-G: A new revolutionary leader asks Mike to help him retrieve his country's hidden gold reserves, believed to have been hidden aboard a scuttled freighter by the ousted former dictator.
TV Rating: TV-G: Mike scouts a path through mine-infested waters so that medical supplies can reach a China Sea port hit by a cholera epidemic.
TV Rating: TV-G: While searching a Latin American harbor for a sunken statue, Mike discovers a UHF homing beacon being used to guide submarines into the port.