Season 1

1. Sixty Feet Below

1958-01-04

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.

2. Flooded Mine

1958-01-11

While investigating the cause of a mine flood that killed thirty men, Mike stumbles upon an air pocket with two survivors.

3. Rapture of the Deep

1958-01-25

A grudge between two divers whom Mike is testing for underwater mining skills becomes a secondary issue when one of them contracts nitrogen narcosis.

4. Mark of the Octopus

1958-02-01

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.

5. The Sea Sled

1958-02-08

Mike helps the Immigration Department Border Patrol break up an underwater border-running operation.

6. Female of the Species

1958-02-15

A beautiful woman hires Mike to give her diving lessons for mysterious reasons.

7. Mr. Guinea Pig

1958-02-22

An attractive magazine photographer hires Mike to assist her in getting pictures of a sunken barge off the coast of Mexico.

8. Sonar Queen

1958-03-01

Hired to test a new electronic fish-finder, Mike encounters a village where every fish in the vicinity has disappeared.

9. Gold Below

1958-03-08

A pair of ruthless treasure hunters dupes a young skin diver into helping them loot a sunken ship.

10. Recovery

1958-03-15

Mike dives into the Caribbean to recover the lost nose cone from an ICBM rocket before enemy agents can get it.

11. Killer Whale

1958-03-22

A killer whale is capsizing boats and endangering scuba divers and swimmers along a stretch of coastline.

12. Midget Submarine

1958-03-29

Mike plays commando in rescuing a scientist who had defected from Soviet kidnappers who are returning him to Moscow aboard a Pacific liner.

13. The Shark Cage

1958-04-05

Mike and two cameramen are imperiled when an irrationally jealous man drops their camera cage into shark-infested waters.

14. Hardhat

1958-04-12

Mike competes with a pair of helmet divers to salvage a German submarine sunk off the coast of South America.

15. Continental Rift

1958-04-19

A man claims to have invented a machine that can locate ships carrying gold.

16. The Poacher

1958-04-26

Mike is nearly killed by a massive electrical jolt used by a poacher to kill fish in the Florida Everglades.

17. Girl in the Trunk

1958-05-03

Mike comes to the aid of a female escape artist when her underwater stunt goes awry.

18. The Sponge Divers

1958-05-10

Mike interrupts an underwater survey in the Gulf of Mexico in order to save a diver whose air line has become snarled.

19. Diamond River

1958-05-17

Mike supervises a diamond diving expedition in South America, but discovers that his employers are poaching on someone else's property.

20. Alligator Story

1958-05-24

A vicious alligator escapes from a wild animal show and takes refuge in the lake of a public park.

21. Magnetic Mine

1958-05-31

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.

22. Underwater Patrol

1958-06-07

The State of Florida hires Mike to organize and train an underwater police force to deal with a series of underwater crimes.

23. Legend of the Mermaid

1958-06-14

Mike investigates an underwater grotto said to feature a mermaid that lures men to their deaths.

24. Pressure Suit

1958-06-21

A professor and his daughter hire Mike to help them search for a rare underwater plant in Costa Rica.

25. The Prospectors

1958-06-28

A pair of prospectors hire Mike to trace the source of radioactive fish with a Geiger counter in hopes of finding a uranium deposit.

26. The Hero

1958-07-05

Mike is hired by a playboy sportsman to supervise their underwater shark ""safari"" in the waters off Peru.

27. Underwater Station

1958-07-12

Mike finds a famous rocket scientist being held in an underwater prison by enemy agents.

28. The Lost Ones

1958-07-19

A frustrated former athlete pushes his children to be Olympic swimmers, resulting in their becoming trapped in a cave by a rising tide.

29. Capture of the Santa Rosa

1958-07-26

Mike leads a diving team in rescuing a Latin American diplomat and his family from kidnappers.

30. The Shipwreck

1958-08-02

Mike and three other survivors share a life raft after a storm capsizes their boats.

31. The Big Dive

1958-08-09

Mike's work on a movie prompts a fellow stunt diver to attempt a dangerous record-setting dive.

32. The Birthday Present

1958-08-16

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.

33. Dead Man's Cove

1958-08-23

An underwater camera holds the key to determining whether a woman's drowning was accidental, as her husband claims, or not.

34. Explosion

1958-08-30

Mike is hired to destroy an underwater offshore peak that is notorious for ripping the hulls out of passing ships.

35. The Amphibian

1958-09-06

A group of sportsmen hire Mike to supervise their skin-diving outing, whereupon one of them sneaks off and begins photographing secret Navy facilities.

36. Lord Christobal

1958-09-13

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.

37. Decoy

1958-09-20

Mike investigates reports of a sea monster off the coast of Mexico.

38. The Sea Has Ears

1958-09-27

The murder of a telephone company employee leads Mike to an underwater cable that is being tapped to access top-secret research Conferences.

39. The Manganese Story

1958-10-04

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.