S2E1 - The Alcatraz Story
Mike trains three brothers in the use of scuba gear, unaware that they plan to break a fourth sibling out of Alcatraz.
Jan. 4, 1959, midnight
S2E2 - Operation Greenback
Mike unwittingly shares his explosives expertise with an old navy buddy who is planning an underwater bank heist.
Jan. 11, 1959, midnight
S2E3 - Underwater Security
While testing the coastal security of a rocket fuel plant, Mike discovers a pair of saboteurs.
Jan. 18, 1959, midnight
S2E4 - Underwater Labyrinth
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.
Jan. 25, 1959, midnight
S2E5 - Monte Cristo
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.
Feb. 1, 1959, midnight
S2E6 - The Stunt
An overconfident swimming champion endangers both herself and Mike when she challenges him to an underwater race to Catalina.
Feb. 8, 1959, midnight
S2E7 - Diving for the Moon
Mike and a group of astronauts-in-training are stranded on the seabed when a hurricane blows their boat away.
Feb. 15, 1959, midnight
S2E8 - The Search
Mike comes to the rescue of a scuba diver who has been trapped in a kelp bed while spear fishing.
Feb. 22, 1959, midnight
S2E9 - Jettisoned
Mike races to recover a ditched nuclear warhead before sea water corrodes the casing.
March 1, 1959, midnight
S2E10 - Murder at 60 Feet
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.
March 8, 1959, midnight
S2E11 - Air Pockets
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.
March 15, 1959, midnight
S2E12 - The Dam
While checking the underwater security of a new dam, Mike discovers a bomb that has been placed in an intake valve.
March 22, 1959, midnight
S2E13 - Dock Fire
In an effort to prevent a dock fire from igniting chemicals stored in a warehouse, Mike swims into the building through an intake pipe.
March 29, 1959, midnight
S2E14 - The Persuaders
Drug smugglers force Mike at gunpoint to help them retrieve a sunken shipment of narcotics.
April 5, 1959, midnight
S2E15 - Nerve Gas
After discovering a sunken Japanese submarine, the amateur skin diver who found it goes violently berserk.
April 12, 1959, midnight
S2E16 - Strange Salvage
Mike investigates the deaths of a pair of divers who were murdered after discovering a sunken yacht laden with jewels.
April 19, 1959, midnight
S2E17 - Underwater Survey
While looking into the possibility of linking two Latin American lakes by a canal, Mike runs afoul of rebel guerillas.
April 26, 1959, midnight
S2E18 - Underwater Curtain
Mike discovers a submarine off the Panama coast that is a base of operations for divers planning to destroy the Panama Canal.
May 3, 1959, midnight
S2E19 - Hermes
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.
May 10, 1959, midnight
S2E20 - The Briefcase
A man tricks a scientist into dropping a top-secret folio overboard, where a confederate can retrieve it.
May 17, 1959, midnight
S2E21 - Cave Diving
Mike attempts to rescue a geologist who has been trapped in an underwater cave by a sudden landslide.
May 24, 1959, midnight
S2E22 - Water Ski Show
Mike investigates the mysterious death of the featured performer in a water ski show during the act's underwater finale.
July 1, 1959, midnight
S2E23 - Underwater Shrine
Mike and a pair of archaeologists risk the anger and booby traps of islanders while exploring underwater caves in the Caribbean.
June 7, 1959, midnight
S2E24 - Chain of Evidence
Latin American revolutionaries recruit Mike to recover the body of their murdered leader from the palace lagoon in order to ignite an uprising.
June 14, 1959, midnight
S2E25 - Treasure Hunt
A young skindiver is found murdered after stealing lobsters from an elderly fisherman as an initiation stunt.
June 21, 1959, midnight
S2E26 - Sea Serpent
Mike defies tales of a mysterious sea serpent when he searches for a shipment of stolen liquid explosives in Arabia.
June 28, 1959, midnight
S2E27 - The Getaway
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.
July 5, 1959, midnight
S2E28 - Underwater Ejection
A freak accident endangers a man's life during the test of Mike's new method of retrieving sunken ICBM nose cones.
July 12, 1959, midnight
S2E29 - The Female
A beautiful woman plots revenge against Mike after flunking out of his class for scuba diver instructors.
July 19, 1959, midnight
S2E30 - Port Security
Mike tries to break a ring of drug traffickers who are smuggling heroin into the country in ballast tanks.
July 26, 1959, midnight
S2E31 - Underwater Park
Someone attempts to kill Mike while he's scouting out a site for an underwater marine preserve.
Aug. 2, 1959, midnight
S2E32 - Underwater Unit
Mike is recruited to train a pair of divers for an urgent secret assignment.
Aug. 9, 1959, midnight
S2E33 - Proof of Guilt
Mike uses an underwater TV camera setup to nab thieves who are robbing a Hawaiian girl's pearl beds.
Aug. 16, 1959, midnight
S2E34 - Chained
Mike stands by to assist an undercover man in his assignment to infiltrate an illegal alien-smuggling ring.
Aug. 23, 1959, midnight
S2E35 - Ransom
A husband-wife team steal and then ransom some computer tapes necessary to a plant's operations.
Aug. 30, 1959, midnight
S2E36 - Oil Island
A careless salvage diver is trapped on the deck of a sunken freighter by some lead cable.
Sept. 6, 1959, midnight
S2E37 - Base of Operations
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.
Sept. 13, 1959, midnight
S2E38 - Kelp Forest
A coastal fisherman wages a private war against kelp harvesters, blaming them for ruining the fishing grounds necessary to his livelihood.
Sept. 20, 1959, midnight
S2E39 - The Raft
Mike dives onto a sunken freighter loaded with nitro, planning to detonate the cargo before it drifts away into the shipping lanes.
Sept. 27, 1959, midnight