Season 2

1959-01-04

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

1959-01-11

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

1959-01-18

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

1959-01-25

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.

1959-02-01

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.

1959-02-08

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

1959-02-15

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

1959-02-22

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

1959-03-01

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

1959-03-08

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.

1959-03-15

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.

1959-03-22

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

1959-03-29

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

1959-04-05

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

1959-04-12

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

1959-04-19

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

1959-04-26

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

1959-05-03

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

1959-05-10

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.

1959-05-17

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

1959-05-24

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

1959-07-01

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

1959-06-14

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

1959-06-21

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

1959-06-28

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

1959-07-05

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.

1959-07-12

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

1959-07-19

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

1959-07-26

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

1959-08-02

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

1959-08-09

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

1959-08-16

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

1959-08-23

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

1959-08-30

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

1959-09-06

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

1959-09-13

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.

1959-09-20

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

1959-09-27

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