S4 E1 • Point of No Return

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

Première diffusion : 7 janvier 1961

S4 E2 • 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.

Première diffusion : 14 janvier 1961

S4 E3 • The Destroyers

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

Première diffusion : 21 janvier 1961

S4 E4 • 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.

Première diffusion : 28 janvier 1961

S4 E5 • 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.

Première diffusion : 4 février 1961

S4 E6 • 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.

Première diffusion : 11 février 1961

S4 E7 • 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.

Première diffusion : 18 février 1961

S4 E8 • 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.

Première diffusion : 25 février 1961

S4 E9 • 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.

Première diffusion : 4 mars 1961

S4 E10 • Sonar Story

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

Première diffusion : 11 mars 1961

S4 E11 • Amigo

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

Première diffusion : 18 mars 1961

S4 E12 • The Aquanettes

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

Première diffusion : 25 mars 1961

S4 E13 • 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.

Première diffusion : 1 avril 1961

S4 E14 • 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.

Première diffusion : 8 avril 1961

S4 E15 • Bionics

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

Première diffusion : 15 avril 1961

S4 E16 • The Defector

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

Première diffusion : 22 avril 1961

S4 E17 • Niko

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

Première diffusion : 29 avril 1961

S4 E18 • Cougar

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

Première diffusion : 6 mai 1961

S4 E19 • 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.

Première diffusion : 13 mai 1961

S4 E20 • 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.

Première diffusion : 20 mai 1961

S4 E21 • 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.

Première diffusion : 27 mai 1961

S4 E22 • 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.

Première diffusion : 3 juin 1961

S4 E23 • 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.

Première diffusion : 10 juin 1961

S4 E24 • Confidential Mission

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

Première diffusion : 17 juin 1961

S4 E25 • Underwater Pirates

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

Première diffusion : 24 juin 1961

S4 E26 • The Meet

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

Première diffusion : 1 juillet 1961

S4 E27 • Dark Evil

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

Première diffusion : 8 juillet 1961

S4 E28 • 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.

Première diffusion : 15 juillet 1961

S4 E29 • Hit and Run

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

Première diffusion : 22 juillet 1961

S4 E30 • 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.

Première diffusion : 29 juillet 1961

S4 E31 • 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.

Première diffusion : 5 août 1961

S4 E32 • 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.

Première diffusion : 12 août 1961

S4 E33 • 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.

Première diffusion : 19 août 1961

S4 E34 • P.T. Boat

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

Première diffusion : 26 août 1961

S4 E35 • Starting Signal

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

Première diffusion : 2 septembre 1961

S4 E36 • Skipper

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

Première diffusion : 9 septembre 1961

S4 E37 • Crime at Sea

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

Première diffusion : 16 septembre 1961

S4 E38 • Round Up

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

Première diffusion : 23 septembre 1961