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Asylum

Episode number: 1

Overview: 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

Episode number: 2

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

Mister Big

Episode number: 3

Overview: 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

Episode number: 4

Overview: 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

Episode number: 5

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

Cobalt Bomb

Episode number: 6

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

Counterfeit

Episode number: 7

Overview: 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

Episode number: 8

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

Jade Cavern

Episode number: 9

Overview: 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

Episode number: 10

Overview: 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

Episode number: 11

Overview: 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

Episode number: 12

Overview: 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

Episode number: 13

Overview: 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

Episode number: 14

Overview: 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

Episode number: 15

Overview: 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

Episode number: 16

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

Sacred Pool

Episode number: 17

Overview: 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

Episode number: 18

Overview: 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

Episode number: 19

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

Synthetic Hero

Episode number: 20

Overview: 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

Episode number: 21

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

Target

Episode number: 22

Overview: 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

Episode number: 23

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

Rebreather

Episode number: 24

Overview: 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

Episode number: 25

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

The Replacement

Episode number: 26

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

Underwater Beacon

Episode number: 27

Overview: 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

Episode number: 28

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

Storm Drain

Episode number: 29

Overview: 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

Episode number: 30

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

Changing Patterns

Episode number: 31

Overview: 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

Episode number: 32

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

The Missing Link

Episode number: 33

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

Underwater Narcotics

Episode number: 34

Overview: 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

Episode number: 35

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

Prima Donna

Episode number: 36

Overview: 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

Episode number: 37

Overview: 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

Episode number: 38

Overview: 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

Episode number: 39

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