S1E1 - Sixty Feet Below
Mike tries to free the pilot of a downed jet from his watertight cockpit before his air runs out, without causing the man's death from the water pressure.
Jan. 4, 1958, midnight
S1E2 - Flooded Mine
While investigating the cause of a mine flood that killed thirty men, Mike stumbles upon an air pocket with two survivors.
Jan. 11, 1958, midnight
S1E3 - Rapture of the Deep
A grudge between two divers whom Mike is testing for underwater mining skills becomes a secondary issue when one of them contracts nitrogen narcosis.
Jan. 25, 1958, midnight
S1E4 - Mark of the Octopus
Before Mike can investigate the disappearance of a pair of skin-diving geologists, one turns up dead on the beach bearing marks resembling the suction valves of a giant octopus.
Feb. 1, 1958, midnight
S1E5 - The Sea Sled
Mike helps the Immigration Department Border Patrol break up an underwater border-running operation.
Feb. 8, 1958, midnight
S1E6 - Female of the Species
A beautiful woman hires Mike to give her diving lessons for mysterious reasons.
Feb. 15, 1958, midnight
S1E7 - Mr. Guinea Pig
An attractive magazine photographer hires Mike to assist her in getting pictures of a sunken barge off the coast of Mexico.
Feb. 22, 1958, midnight
S1E8 - Sonar Queen
Hired to test a new electronic fish-finder, Mike encounters a village where every fish in the vicinity has disappeared.
March 1, 1958, midnight
S1E9 - Gold Below
A pair of ruthless treasure hunters dupes a young skin diver into helping them loot a sunken ship.
March 8, 1958, midnight
S1E10 - Recovery
Mike dives into the Caribbean to recover the lost nose cone from an ICBM rocket before enemy agents can get it.
March 15, 1958, midnight
S1E11 - Killer Whale
A killer whale is capsizing boats and endangering scuba divers and swimmers along a stretch of coastline.
March 22, 1958, midnight
S1E12 - Midget Submarine
Mike plays commando in rescuing a scientist who had defected from Soviet kidnappers who are returning him to Moscow aboard a Pacific liner.
March 29, 1958, midnight
S1E13 - The Shark Cage
Mike and two cameramen are imperiled when an irrationally jealous man drops their camera cage into shark-infested waters.
April 5, 1958, midnight
S1E14 - Hardhat
Mike competes with a pair of helmet divers to salvage a German submarine sunk off the coast of South America.
April 12, 1958, midnight
S1E15 - Continental Rift
A man claims to have invented a machine that can locate ships carrying gold.
April 19, 1958, midnight
S1E16 - The Poacher
Mike is nearly killed by a massive electrical jolt used by a poacher to kill fish in the Florida Everglades.
April 26, 1958, midnight
S1E17 - Girl in the Trunk
Mike comes to the aid of a female escape artist when her underwater stunt goes awry.
May 3, 1958, midnight
S1E18 - The Sponge Divers
Mike interrupts an underwater survey in the Gulf of Mexico in order to save a diver whose air line has become snarled.
May 10, 1958, midnight
S1E19 - Diamond River
Mike supervises a diamond diving expedition in South America, but discovers that his employers are poaching on someone else's property.
May 17, 1958, midnight
S1E20 - Alligator Story
A vicious alligator escapes from a wild animal show and takes refuge in the lake of a public park.
May 24, 1958, midnight
S1E21 - Magnetic Mine
An entire Mexican town is menaced by the presence of a derelict floating mine in its harbor that could ignite fumes from the local nitrate factory if it is detonated.
May 31, 1958, midnight
S1E22 - Underwater Patrol
The State of Florida hires Mike to organize and train an underwater police force to deal with a series of underwater crimes.
June 7, 1958, midnight
S1E23 - Legend of the Mermaid
Mike investigates an underwater grotto said to feature a mermaid that lures men to their deaths.
June 14, 1958, midnight
S1E24 - Pressure Suit
A professor and his daughter hire Mike to help them search for a rare underwater plant in Costa Rica.
June 21, 1958, midnight
S1E25 - The Prospectors
A pair of prospectors hire Mike to trace the source of radioactive fish with a Geiger counter in hopes of finding a uranium deposit.
June 28, 1958, midnight
S1E26 - The Hero
Mike is hired by a playboy sportsman to supervise their underwater shark ""safari"" in the waters off Peru.
July 5, 1958, midnight
S1E27 - Underwater Station
Mike finds a famous rocket scientist being held in an underwater prison by enemy agents.
July 12, 1958, midnight
S1E28 - The Lost Ones
A frustrated former athlete pushes his children to be Olympic swimmers, resulting in their becoming trapped in a cave by a rising tide.
July 19, 1958, midnight
S1E29 - Capture of the Santa Rosa
Mike leads a diving team in rescuing a Latin American diplomat and his family from kidnappers.
July 26, 1958, midnight
S1E30 - The Shipwreck
Mike and three other survivors share a life raft after a storm capsizes their boats.
Aug. 2, 1958, midnight
S1E31 - The Big Dive
Mike's work on a movie prompts a fellow stunt diver to attempt a dangerous record-setting dive.
Aug. 9, 1958, midnight
S1E32 - The Birthday Present
After locating a leak in a gas line and retrieving a young boy's sunken bicycle, Mike is beaten up and threatened by a gang of thugs.
Aug. 16, 1958, midnight
S1E33 - Dead Man's Cove
An underwater camera holds the key to determining whether a woman's drowning was accidental, as her husband claims, or not.
Aug. 23, 1958, midnight
S1E34 - Explosion
Mike is hired to destroy an underwater offshore peak that is notorious for ripping the hulls out of passing ships.
Aug. 30, 1958, midnight
S1E35 - The Amphibian
A group of sportsmen hire Mike to supervise their skin-diving outing, whereupon one of them sneaks off and begins photographing secret Navy facilities.
Sept. 6, 1958, midnight
S1E36 - Lord Christobal
Mike is hired by an insurance company to investigate the sinking of a freighter, but a murder indicates that someone doesn't want him to complete his task.
Sept. 13, 1958, midnight
S1E37 - Decoy
Mike investigates reports of a sea monster off the coast of Mexico.
Sept. 20, 1958, midnight
S1E38 - The Sea Has Ears
The murder of a telephone company employee leads Mike to an underwater cable that is being tapped to access top-secret research Conferences.
Sept. 27, 1958, midnight
S1E39 - The Manganese Story
Mike discovers an important manganese deposit, but an ambitious young geologist, sharks, and an approaching hurricane threaten to silence him before he can inform the government.
Oct. 4, 1958, midnight