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.

While investigating the cause of a mine flood that killed thirty men, Mike stumbles upon an air pocket with two survivors.

A grudge between two divers whom Mike is testing for underwater mining skills becomes a secondary issue when one of them contracts nitrogen narcosis.

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.

Mike helps the Immigration Department Border Patrol break up an underwater border-running operation.

A beautiful woman hires Mike to give her diving lessons for mysterious reasons.

An attractive magazine photographer hires Mike to assist her in getting pictures of a sunken barge off the coast of Mexico.

Hired to test a new electronic fish-finder, Mike encounters a village where every fish in the vicinity has disappeared.

A pair of ruthless treasure hunters dupes a young skin diver into helping them loot a sunken ship.

Mike dives into the Caribbean to recover the lost nose cone from an ICBM rocket before enemy agents can get it.

A killer whale is capsizing boats and endangering scuba divers and swimmers along a stretch of coastline.

Mike plays commando in rescuing a scientist who had defected from Soviet kidnappers who are returning him to Moscow aboard a Pacific liner.

Mike and two cameramen are imperiled when an irrationally jealous man drops their camera cage into shark-infested waters.

Mike competes with a pair of helmet divers to salvage a German submarine sunk off the coast of South America.

A man claims to have invented a machine that can locate ships carrying gold.

Mike is nearly killed by a massive electrical jolt used by a poacher to kill fish in the Florida Everglades.

Mike comes to the aid of a female escape artist when her underwater stunt goes awry.

Mike interrupts an underwater survey in the Gulf of Mexico in order to save a diver whose air line has become snarled.

Mike supervises a diamond diving expedition in South America, but discovers that his employers are poaching on someone else's property.

A vicious alligator escapes from a wild animal show and takes refuge in the lake of a public park.

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.

The State of Florida hires Mike to organize and train an underwater police force to deal with a series of underwater crimes.

Mike investigates an underwater grotto said to feature a mermaid that lures men to their deaths.

A professor and his daughter hire Mike to help them search for a rare underwater plant in Costa Rica.

A pair of prospectors hire Mike to trace the source of radioactive fish with a Geiger counter in hopes of finding a uranium deposit.

Mike is hired by a playboy sportsman to supervise their underwater shark ""safari"" in the waters off Peru.

Mike finds a famous rocket scientist being held in an underwater prison by enemy agents.

A frustrated former athlete pushes his children to be Olympic swimmers, resulting in their becoming trapped in a cave by a rising tide.

Mike leads a diving team in rescuing a Latin American diplomat and his family from kidnappers.

Mike and three other survivors share a life raft after a storm capsizes their boats.

Mike's work on a movie prompts a fellow stunt diver to attempt a dangerous record-setting dive.

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.

An underwater camera holds the key to determining whether a woman's drowning was accidental, as her husband claims, or not.

Mike is hired to destroy an underwater offshore peak that is notorious for ripping the hulls out of passing ships.

A group of sportsmen hire Mike to supervise their skin-diving outing, whereupon one of them sneaks off and begins photographing secret Navy facilities.

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.

Mike investigates reports of a sea monster off the coast of Mexico.

The murder of a telephone company employee leads Mike to an underwater cable that is being tapped to access top-secret research Conferences.

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.

Mike trains three brothers in the use of scuba gear, unaware that they plan to break a fourth sibling out of Alcatraz.

Mike unwittingly shares his explosives expertise with an old navy buddy who is planning an underwater bank heist.

While testing the coastal security of a rocket fuel plant, Mike discovers a pair of saboteurs.

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.

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.

An overconfident swimming champion endangers both herself and Mike when she challenges him to an underwater race to Catalina.

Mike and a group of astronauts-in-training are stranded on the seabed when a hurricane blows their boat away.

Mike comes to the rescue of a scuba diver who has been trapped in a kelp bed while spear fishing.

Mike races to recover a ditched nuclear warhead before sea water corrodes the casing.

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.

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.

While checking the underwater security of a new dam, Mike discovers a bomb that has been placed in an intake valve.

In an effort to prevent a dock fire from igniting chemicals stored in a warehouse, Mike swims into the building through an intake pipe.

Drug smugglers force Mike at gunpoint to help them retrieve a sunken shipment of narcotics.

After discovering a sunken Japanese submarine, the amateur skin diver who found it goes violently berserk.

Mike investigates the deaths of a pair of divers who were murdered after discovering a sunken yacht laden with jewels.

While looking into the possibility of linking two Latin American lakes by a canal, Mike runs afoul of rebel guerillas.

Mike discovers a submarine off the Panama coast that is a base of operations for divers planning to destroy the Panama Canal.

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.

A man tricks a scientist into dropping a top-secret folio overboard, where a confederate can retrieve it.

Mike attempts to rescue a geologist who has been trapped in an underwater cave by a sudden landslide.

Mike and a pair of archaeologists risk the anger and booby traps of islanders while exploring underwater caves in the Caribbean.

Latin American revolutionaries recruit Mike to recover the body of their murdered leader from the palace lagoon in order to ignite an uprising.

A young skindiver is found murdered after stealing lobsters from an elderly fisherman as an initiation stunt.

Mike defies tales of a mysterious sea serpent when he searches for a shipment of stolen liquid explosives in Arabia.

Mike investigates the mysterious death of the featured performer in a water ski show during the act's underwater finale.

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.

A freak accident endangers a man's life during the test of Mike's new method of retrieving sunken ICBM nose cones.

A beautiful woman plots revenge against Mike after flunking out of his class for scuba diver instructors.

Mike tries to break a ring of drug traffickers who are smuggling heroin into the country in ballast tanks.

Someone attempts to kill Mike while he's scouting out a site for an underwater marine preserve.

Mike is recruited to train a pair of divers for an urgent secret assignment.

Mike uses an underwater TV camera setup to nab thieves who are robbing a Hawaiian girl's pearl beds.

Mike stands by to assist an undercover man in his assignment to infiltrate an illegal alien-smuggling ring.

A husband-wife team steal and then ransom some computer tapes necessary to a plant's operations.

A careless salvage diver is trapped on the deck of a sunken freighter by some lead cable.

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.

A coastal fisherman wages a private war against kelp harvesters, blaming them for ruining the fishing grounds necessary to his livelihood.

Mike dives onto a sunken freighter loaded with nitro, planning to detonate the cargo before it drifts away into the shipping lanes.

Working for the State Department, Mike attempts to rescue a political prisoner in South America by using a harbor city's canal system.

A swimsuit designer hires Mike to do an underwater fashion shoot, but corporate espionage interferes with the job.

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.

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.

An accidental death puts Mike onto an espionage ring that is using an underwater cave for a microfilm drop site.

Mike and a female health official try to remove a dangerously radioactive capsule from a sunken ship.

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.

Mike finds that someone has tapped the underwater cable used in monitoring a televised missile test.

Mike rescues a diver in the Bahamas, then helps her with her research into the origin of a jade statue she owns.

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.

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.

In preparation for the visit of a foreign head of state, Mike helps the Coast Guard do a security check on the area.

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.

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.

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.

Scientists risk triggering a tidal wave when they ignore Mike's warnings about the strength of the explosive charges they're using.

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.

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.

Mike searches for a vanished oceanographer by retracing her charted course.

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.

Mike becomes suspicious when his hired dive on a Spanish galleon yields a rare art treasure.

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.

An East Indian oceanographer vanishes during a series of underwater experiments with infra-red light.

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.

Mike helps a friend in the military with his tests of underwater radar equipment.

Mike straightens out a pair of teenagers who poisoned a shark Mike had captured for Marineland.

While helping to test a friend's underwater radio device, Mike discovers a submerged radio beacon, camouflaged and guarded by an electric gun.

A small Latin American country calls upon Mike to help defuse a sunken munitions ship set to blow by saboteurs.

Mike goes after a newlywed teenager turned fugitive after a bungled holdup prompts him to hide in the city's storm drain system.

Mike trains a pair of frogmen for a rescue mission in which they will rescue their kidnapped president from an ancient fortress.

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 Coast Guard asks Mike to investigate the drowning death of a scientist who had invented a new type of rebreather.

A scientific society hires Mike to obtain fossil samples from a newly-discovered underwater cavern for the purpose of authentication.

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.

Mike is sent by the government to investigate a jamming signal affecting a listening station in the Indian Ocean.

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.

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.

Mike tries to outmaneuver a foreign harbormaster as he attempts to retrieve a diplomatic pouch from an airliner that crashed into the sea.

Mike responds to a ""man overboard"" situation, but an extensive search turns up no victim.

Mike is trapped in a ""scubasphere"" when the cable attached to it snaps.

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.

Mike investigates the source of a radar jamming signal that caused two ships to collide.

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.

A scuba diving ballerina faces the possibility of underwater amputation when she catches her foot between the buckled plates of a sunken freighter.

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.

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.

Mike scouts a path through mine-infested waters so that medical supplies can reach a China Sea port hit by a cholera epidemic.

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.

Mike uses sonar to foil a gang of underwater heroin smugglers.

A young Mexican boy helps Mike locate a safe entrance to an underwater fossil cave.

Mike faces sharks and other unexpected difficulties while working with three pretty women undergoing astronaut training.

Mike is hired by a local German consul to salvage a survival kit from the wreckage of a Nazi warplane in the Caribbean.

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.

Mike convinces a reluctant daughter to continue her father's work after he is killed testing an underwater electrical detection device.

A man bribes Mike to continue giving lessons to an inept diving student whom he's stopped teaching.

Mike heads a three-man team in an effort to disarm a pair of unexploded torpedoes at the bototm of a West Coast harbor.

A restless youth and a college girl complicate Mike's attempts at capturing a poisonous lionfish.

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.

Markings on the body of a dead diver convince a marine biologist that a tropical lagoon is inhabited by a killer octopus.

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.

Mike teams up with a Mexican prison escapee to uncover nefarious activity on an uncharted Pacific atoll off the coast of South America.

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.

Mike poses as a tourist on vacation as he tries to locate a hidden underwater missile launcher in the Caribbean.

Pirates try to snatch a sunken freighter away from Mike before he can salvage it for an old Navy buddy.

While working for the U.S. Treasury to break a counterfeiting ring, Mike intercedes in a kidnapping.

A pretty woman and her father, vacationing in the Bahamas, become killers after inadvertently eating a variety of fish that causes hallucinations.

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.

Mike goes after an egocentric movie star who injured a friend of Mike's in a hit-and-fun speedboat accident.

While searching a Latin American harbor for a sunken statue, Mike discovers a UHF homing beacon being used to guide submarines into the port.

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.

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.

Mike's assistant is trapped underwater by an overturned truck containing drums of poison that could endanger a South American city's water supply.

Mike helps test a remote control guidance device invented by a rich eccentric.

A naval officer of a Caribbean nation is sabotaging a series of experiments Mike is conducting with the Coast Guard.

During hydroplane races, a friend of Mike's rams his craft into a Coast Guard ship, leaving Mike to investigate.

Mike helps the daughter of his old UDT Commander investigate the man's death, which she believes was murder.

Mike must find and disarm a torpedo that's been sent into the outflow tube of a hydro-electric plant.