Aired: 1/4/1959
Mike trains three brothers in the use of scuba gear, unaware that they plan to break a fourth sibling out of Alcatraz.
Aired: 1/11/1959
Mike unwittingly shares his explosives expertise with an old navy buddy who is planning an underwater bank heist.
Aired: 1/18/1959
While testing the coastal security of a rocket fuel plant, Mike discovers a pair of saboteurs.
Aired: 1/25/1959
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.
Aired: 2/1/1959
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.
Aired: 2/8/1959
An overconfident swimming champion endangers both herself and Mike when she challenges him to an underwater race to Catalina.
Aired: 2/15/1959
Mike and a group of astronauts-in-training are stranded on the seabed when a hurricane blows their boat away.
Aired: 2/22/1959
Mike comes to the rescue of a scuba diver who has been trapped in a kelp bed while spear fishing.
Aired: 3/1/1959
Mike races to recover a ditched nuclear warhead before sea water corrodes the casing.
Aired: 3/8/1959
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.
Aired: 3/15/1959
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.
Aired: 3/22/1959
While checking the underwater security of a new dam, Mike discovers a bomb that has been placed in an intake valve.
Aired: 3/29/1959
In an effort to prevent a dock fire from igniting chemicals stored in a warehouse, Mike swims into the building through an intake pipe.
Aired: 4/5/1959
Drug smugglers force Mike at gunpoint to help them retrieve a sunken shipment of narcotics.
Aired: 4/12/1959
After discovering a sunken Japanese submarine, the amateur skin diver who found it goes violently berserk.
Aired: 4/19/1959
Mike investigates the deaths of a pair of divers who were murdered after discovering a sunken yacht laden with jewels.
Aired: 4/26/1959
While looking into the possibility of linking two Latin American lakes by a canal, Mike runs afoul of rebel guerillas.
Aired: 5/3/1959
Mike discovers a submarine off the Panama coast that is a base of operations for divers planning to destroy the Panama Canal.
Aired: 5/10/1959
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.
Aired: 5/17/1959
A man tricks a scientist into dropping a top-secret folio overboard, where a confederate can retrieve it.
Aired: 5/24/1959
Mike attempts to rescue a geologist who has been trapped in an underwater cave by a sudden landslide.
Aired: 7/1/1959
Mike investigates the mysterious death of the featured performer in a water ski show during the act's underwater finale.
Aired: 6/7/1959
Mike and a pair of archaeologists risk the anger and booby traps of islanders while exploring underwater caves in the Caribbean.
Aired: 6/14/1959
Latin American revolutionaries recruit Mike to recover the body of their murdered leader from the palace lagoon in order to ignite an uprising.
Aired: 6/21/1959
A young skindiver is found murdered after stealing lobsters from an elderly fisherman as an initiation stunt.
Aired: 6/28/1959
Mike defies tales of a mysterious sea serpent when he searches for a shipment of stolen liquid explosives in Arabia.
Aired: 7/5/1959
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.
Aired: 7/12/1959
A freak accident endangers a man's life during the test of Mike's new method of retrieving sunken ICBM nose cones.
Aired: 7/19/1959
A beautiful woman plots revenge against Mike after flunking out of his class for scuba diver instructors.
Aired: 7/26/1959
Mike tries to break a ring of drug traffickers who are smuggling heroin into the country in ballast tanks.
Aired: 8/2/1959
Someone attempts to kill Mike while he's scouting out a site for an underwater marine preserve.
Aired: 8/9/1959
Mike is recruited to train a pair of divers for an urgent secret assignment.
Aired: 8/16/1959
Mike uses an underwater TV camera setup to nab thieves who are robbing a Hawaiian girl's pearl beds.
Aired: 8/23/1959
Mike stands by to assist an undercover man in his assignment to infiltrate an illegal alien-smuggling ring.
Aired: 8/30/1959
A husband-wife team steal and then ransom some computer tapes necessary to a plant's operations.
Aired: 9/6/1959
A careless salvage diver is trapped on the deck of a sunken freighter by some lead cable.
Aired: 9/13/1959
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.
Aired: 9/20/1959
A coastal fisherman wages a private war against kelp harvesters, blaming them for ruining the fishing grounds necessary to his livelihood.
Aired: 9/27/1959
Mike dives onto a sunken freighter loaded with nitro, planning to detonate the cargo before it drifts away into the shipping lanes.
