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

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.

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

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.

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.

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

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.

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.

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

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 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.

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

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.

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.

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

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

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

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.

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.

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

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 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.

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 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.

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

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 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.

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.

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

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.

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.

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

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.

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

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.