Episodes
Sixty Feet Below
Mike tries to free the pilot of a downed jet from his watertight cockpit before his air runs out, without causing the man's death from the water pressure.
Flooded Mine
While investigating the cause of a mine flood that killed thirty men, Mike stumbles upon an air pocket with two survivors.
Rapture of the Deep
A grudge between two divers whom Mike is testing for underwater mining skills becomes a secondary issue when one of them contracts nitrogen narcosis.
Mark of the Octopus
Before Mike can investigate the disappearance of a pair of skin-diving geologists, one turns up dead on the beach bearing marks resembling the suction valves of a giant octopus.
The Sea Sled
Mike helps the Immigration Department Border Patrol break up an underwater border-running operation.
Female of the Species
A beautiful woman hires Mike to give her diving lessons for mysterious reasons.
Mr. Guinea Pig
An attractive magazine photographer hires Mike to assist her in getting pictures of a sunken barge off the coast of Mexico.
Sonar Queen
Hired to test a new electronic fish-finder, Mike encounters a village where every fish in the vicinity has disappeared.
Gold Below
A pair of ruthless treasure hunters dupes a young skin diver into helping them loot a sunken ship.
Recovery
Mike dives into the Caribbean to recover the lost nose cone from an ICBM rocket before enemy agents can get it.
Killer Whale
A killer whale is capsizing boats and endangering scuba divers and swimmers along a stretch of coastline.
Midget Submarine
Mike plays commando in rescuing a scientist who had defected from Soviet kidnappers who are returning him to Moscow aboard a Pacific liner.
The Shark Cage
Mike and two cameramen are imperiled when an irrationally jealous man drops their camera cage into shark-infested waters.
Hardhat
Mike competes with a pair of helmet divers to salvage a German submarine sunk off the coast of South America.
Continental Rift
A man claims to have invented a machine that can locate ships carrying gold.
The Poacher
Mike is nearly killed by a massive electrical jolt used by a poacher to kill fish in the Florida Everglades.
Girl in the Trunk
Mike comes to the aid of a female escape artist when her underwater stunt goes awry.
The Sponge Divers
Mike interrupts an underwater survey in the Gulf of Mexico in order to save a diver whose air line has become snarled.
Diamond River
Mike supervises a diamond diving expedition in South America, but discovers that his employers are poaching on someone else's property.
Alligator Story
A vicious alligator escapes from a wild animal show and takes refuge in the lake of a public park.
Magnetic Mine
An entire Mexican town is menaced by the presence of a derelict floating mine in its harbor that could ignite fumes from the local nitrate factory if it is detonated.
Underwater Patrol
The State of Florida hires Mike to organize and train an underwater police force to deal with a series of underwater crimes.
Legend of the Mermaid
Mike investigates an underwater grotto said to feature a mermaid that lures men to their deaths.
Pressure Suit
A professor and his daughter hire Mike to help them search for a rare underwater plant in Costa Rica.
The Prospectors
A pair of prospectors hire Mike to trace the source of radioactive fish with a Geiger counter in hopes of finding a uranium deposit.
The Hero
Mike is hired by a playboy sportsman to supervise their underwater shark ""safari"" in the waters off Peru.
Underwater Station
Mike finds a famous rocket scientist being held in an underwater prison by enemy agents.
The Lost Ones
A frustrated former athlete pushes his children to be Olympic swimmers, resulting in their becoming trapped in a cave by a rising tide.
Capture of the Santa Rosa
Mike leads a diving team in rescuing a Latin American diplomat and his family from kidnappers.
The Shipwreck
Mike and three other survivors share a life raft after a storm capsizes their boats.
The Big Dive
Mike's work on a movie prompts a fellow stunt diver to attempt a dangerous record-setting dive.
The Birthday Present
After locating a leak in a gas line and retrieving a young boy's sunken bicycle, Mike is beaten up and threatened by a gang of thugs.
Dead Man's Cove
An underwater camera holds the key to determining whether a woman's drowning was accidental, as her husband claims, or not.
Explosion
Mike is hired to destroy an underwater offshore peak that is notorious for ripping the hulls out of passing ships.
The Amphibian
A group of sportsmen hire Mike to supervise their skin-diving outing, whereupon one of them sneaks off and begins photographing secret Navy facilities.
Lord Christobal
Mike is hired by an insurance company to investigate the sinking of a freighter, but a murder indicates that someone doesn't want him to complete his task.
Decoy
Mike investigates reports of a sea monster off the coast of Mexico.
The Sea Has Ears
The murder of a telephone company employee leads Mike to an underwater cable that is being tapped to access top-secret research Conferences.
The Manganese Story
Mike discovers an important manganese deposit, but an ambitious young geologist, sharks, and an approaching hurricane threaten to silence him before he can inform the government.
The Alcatraz Story
Mike trains three brothers in the use of scuba gear, unaware that they plan to break a fourth sibling out of Alcatraz.
Operation Greenback
Mike unwittingly shares his explosives expertise with an old navy buddy who is planning an underwater bank heist.
Underwater Security
While testing the coastal security of a rocket fuel plant, Mike discovers a pair of saboteurs.
Underwater Labyrinth
Mike is hired to retrieve a new guided-missile tracking device from a test boat sunk during a Florida hurricane, but finds that underwater thieves have beaten him to the punch.
Monte Cristo
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.
The Stunt
An overconfident swimming champion endangers both herself and Mike when she challenges him to an underwater race to Catalina.
Diving for the Moon
Mike and a group of astronauts-in-training are stranded on the seabed when a hurricane blows their boat away.
The Search
Mike comes to the rescue of a scuba diver who has been trapped in a kelp bed while spear fishing.
Jettisoned
Mike races to recover a ditched nuclear warhead before sea water corrodes the casing.
Murder at 60 Feet
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.
Air Pockets
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.
The Dam
While checking the underwater security of a new dam, Mike discovers a bomb that has been placed in an intake valve.
Dock Fire
In an effort to prevent a dock fire from igniting chemicals stored in a warehouse, Mike swims into the building through an intake pipe.
The Persuaders
Drug smugglers force Mike at gunpoint to help them retrieve a sunken shipment of narcotics.
Nerve Gas
After discovering a sunken Japanese submarine, the amateur skin diver who found it goes violently berserk.
Strange Salvage
Mike investigates the deaths of a pair of divers who were murdered after discovering a sunken yacht laden with jewels.
Underwater Survey
While looking into the possibility of linking two Latin American lakes by a canal, Mike runs afoul of rebel guerillas.
Underwater Curtain
Mike discovers a submarine off the Panama coast that is a base of operations for divers planning to destroy the Panama Canal.
Hermes
A Greek sponge diver and his pretty girlfriend lay a minefield for Mike, fearful that he will interfere with their discovery of a valuable statue on the Mediterranean seabed.
The Briefcase
A man tricks a scientist into dropping a top-secret folio overboard, where a confederate can retrieve it.
Cave Diving
Mike attempts to rescue a geologist who has been trapped in an underwater cave by a sudden landslide.
Water Ski Show
Mike investigates the mysterious death of the featured performer in a water ski show during the act's underwater finale.
Underwater Shrine
Mike and a pair of archaeologists risk the anger and booby traps of islanders while exploring underwater caves in the Caribbean.
Chain of Evidence
Latin American revolutionaries recruit Mike to recover the body of their murdered leader from the palace lagoon in order to ignite an uprising.
Treasure Hunt
A young skindiver is found murdered after stealing lobsters from an elderly fisherman as an initiation stunt.
Sea Serpent
Mike defies tales of a mysterious sea serpent when he searches for a shipment of stolen liquid explosives in Arabia.
The Getaway
After one of their number is wounded in the robbery of a beach side casino, a team of thieves kidnap a doctor's wife in order to lure the physician into a trap.
Underwater Ejection
A freak accident endangers a man's life during the test of Mike's new method of retrieving sunken ICBM nose cones.
The Female
A beautiful woman plots revenge against Mike after flunking out of his class for scuba diver instructors.
Port Security
Mike tries to break a ring of drug traffickers who are smuggling heroin into the country in ballast tanks.
Underwater Park
Someone attempts to kill Mike while he's scouting out a site for an underwater marine preserve.
Underwater Unit
Mike is recruited to train a pair of divers for an urgent secret assignment.
Proof of Guilt
Mike uses an underwater TV camera setup to nab thieves who are robbing a Hawaiian girl's pearl beds.
Chained
Mike stands by to assist an undercover man in his assignment to infiltrate an illegal alien-smuggling ring.
Ransom
A husband-wife team steal and then ransom some computer tapes necessary to a plant's operations.
Oil Island
A careless salvage diver is trapped on the deck of a sunken freighter by some lead cable.
Base of Operations
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.
Kelp Forest
A coastal fisherman wages a private war against kelp harvesters, blaming them for ruining the fishing grounds necessary to his livelihood.
The Raft
Mike dives onto a sunken freighter loaded with nitro, planning to detonate the cargo before it drifts away into the shipping lanes.
Asylum
Working for the State Department, Mike attempts to rescue a political prisoner in South America by using a harbor city's canal system.
Water Nymphs
A swimsuit designer hires Mike to do an underwater fashion shoot, but corporate espionage interferes with the job.
Mister Big
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.
Hot Cargo
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.
Underwater Drop
An accidental death puts Mike onto an espionage ring that is using an underwater cave for a microfilm drop site.
Cobalt Bomb
Mike and a female health official try to remove a dangerously radioactive capsule from a sunken ship.
Counterfeit
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.
Missile Watch
Mike finds that someone has tapped the underwater cable used in monitoring a televised missile test.
Jade Cavern
Mike rescues a diver in the Bahamas, then helps her with her research into the origin of a jade statue she owns.
Expatriate's Return
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.
Strong Box
Mike leads the way in a salvage operation to recover more than a million dollars' worth of gems from the captain's safe of a sunken ship.
The Fearmakers
In preparation for the visit of a foreign head of state, Mike helps the Coast Guard do a security check on the area.
Revolutionary Spoils
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.
Pirate Gold
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.
The Living Fossil
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.
Submarine Explosion
Scientists risk triggering a tidal wave when they ignore Mike's warnings about the strength of the explosive charges they're using.
Sacred Pool
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.
Cindy
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.
Cross Current
Mike searches for a vanished oceanographer by retracing her charted course.
Synthetic Hero
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.
The Cellini Vase
Mike becomes suspicious when his hired dive on a Spanish galleon yields a rare art treasure.
Target
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.
Ghost Light
An East Indian oceanographer vanishes during a series of underwater experiments with infra-red light.
Rebreather
Mike and an old war buddy use a new, untested ""re-breather"" to investigate an underwater missile site being constructed in the channel of a privately-owned island.
Blind Spot
Mike helps a friend in the military with his tests of underwater radar equipment.
The Replacement
Mike straightens out a pair of teenagers who poisoned a shark Mike had captured for Marineland.
Underwater Beacon
While helping to test a friend's underwater radio device, Mike discovers a submerged radio beacon, camouflaged and guarded by an electric gun.
Time Fuse
A small Latin American country calls upon Mike to help defuse a sunken munitions ship set to blow by saboteurs.
Storm Drain
Mike goes after a newlywed teenager turned fugitive after a bungled holdup prompts him to hide in the city's storm drain system.
The Invader
Mike trains a pair of frogmen for a rescue mission in which they will rescue their kidnapped president from an ancient fortress.
Changing Patterns
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.
The Catalyst
The Coast Guard asks Mike to investigate the drowning death of a scientist who had invented a new type of rebreather.
The Missing Link
A scientific society hires Mike to obtain fossil samples from a newly-discovered underwater cavern for the purpose of authentication.
Underwater Narcotics
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.
The Sound of Nothing
Mike is sent by the government to investigate a jamming signal affecting a listening station in the Indian Ocean.
Prima Donna
Another movie company using Mike as an advisor needs his help when a planned torpedo blast traps the star and a Hollywood columnist onboard a sinking ship.
Beyond Limits
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.
Diplomatic Pouch
Mike tries to outmaneuver a foreign harbormaster as he attempts to retrieve a diplomatic pouch from an airliner that crashed into the sea.
Man Overboard
Mike responds to a ""man overboard"" situation, but an extensive search turns up no victim.
Point of No Return
Mike is trapped in a ""scubasphere"" when the cable attached to it snaps.
River Treasure
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.
The Destroyers
Mike investigates the source of a radar jamming signal that caused two ships to collide.
Vital Error
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.
The Dancer
A scuba diving ballerina faces the possibility of underwater amputation when she catches her foot between the buckled plates of a sunken freighter.
Sperling of Lamatsue
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.
Rescue
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.
Mercy Trip
Mike scouts a path through mine-infested waters so that medical supplies can reach a China Sea port hit by a cholera epidemic.
Hot Tracer
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.
Sonar Story
Mike uses sonar to foil a gang of underwater heroin smugglers.
Amigo
A young Mexican boy helps Mike locate a safe entrance to an underwater fossil cave.
The Aquanettes
Mike faces sharks and other unexpected difficulties while working with three pretty women undergoing astronaut training.
Survival Kit
Mike is hired by a local German consul to salvage a survival kit from the wreckage of a Nazi warplane in the Caribbean.
Expedition
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.
Bionics
Mike convinces a reluctant daughter to continue her father's work after he is killed testing an underwater electrical detection device.
The Defector
A man bribes Mike to continue giving lessons to an inept diving student whom he's stopped teaching.
Niko
Mike heads a three-man team in an effort to disarm a pair of unexploded torpedoes at the bototm of a West Coast harbor.
Cougar
A restless youth and a college girl complicate Mike's attempts at capturing a poisonous lionfish.
Sub Hatch
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 Octopus Story
Markings on the body of a dead diver convince a marine biologist that a tropical lagoon is inhabited by a killer octopus.
Quicksand
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.
Lost Island
Mike teams up with a Mexican prison escapee to uncover nefarious activity on an uncharted Pacific atoll off the coast of South America.
Baby
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.
Confidential Mission
Mike poses as a tourist on vacation as he tries to locate a hidden underwater missile launcher in the Caribbean.
Underwater Pirates
Pirates try to snatch a sunken freighter away from Mike before he can salvage it for an old Navy buddy.
The Meet
While working for the U.S. Treasury to break a counterfeiting ring, Mike intercedes in a kidnapping.
Dark Evil
A pretty woman and her father, vacationing in the Bahamas, become killers after inadvertently eating a variety of fish that causes hallucinations.
Sunken Car
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.
Hit and Run
Mike goes after an egocentric movie star who injured a friend of Mike's in a hit-and-fun speedboat accident.
The Saint Story
While searching a Latin American harbor for a sunken statue, Mike discovers a UHF homing beacon being used to guide submarines into the port.
Impostor
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.
Superman
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.
Roustabout
Mike's assistant is trapped underwater by an overturned truck containing drums of poison that could endanger a South American city's water supply.
P.T. Boat
Mike helps test a remote control guidance device invented by a rich eccentric.
Starting Signal
A naval officer of a Caribbean nation is sabotaging a series of experiments Mike is conducting with the Coast Guard.
Skipper
During hydroplane races, a friend of Mike's rams his craft into a Coast Guard ship, leaving Mike to investigate.
Crime at Sea
Mike helps the daughter of his old UDT Commander investigate the man's death, which she believes was murder.
Round Up
Mike must find and disarm a torpedo that's been sent into the outflow tube of a hydro-electric plant.
Cast
Lloyd Bridges
Mike Nelson
Crew
Frederick Ziv
Producer
John Florea
Producer
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