Season 3

E1. Asylum

Jan 9, 1960

Working for the State Department, Mike attempts to rescue a political prisoner in South America by using a harbor city's canal system.

E2. Water Nymphs

Jan 16, 1960

A swimsuit designer hires Mike to do an underwater fashion shoot, but corporate espionage interferes with the job.

E3. Mister Big

Jan 23, 1960

Mike attempts to deal a blow to organized crime by using a periscope camera to photograph a secret meeting of mob bosses at a lakeside estate.

E4. Hot Cargo

Jan 30, 1960

Mike finds high radiation coming from the hull of a foreign freighter, but when the Coast Guard investigates, they find no trace of the radioactivity.

E5. Underwater Drop

Feb 6, 1960

An accidental death puts Mike onto an espionage ring that is using an underwater cave for a microfilm drop site.

E6. Cobalt Bomb

Feb 13, 1960

Mike and a female health official try to remove a dangerously radioactive capsule from a sunken ship.

E7. Counterfeit

Feb 20, 1960

Mike, working with a pretty Secret Service agent, poses as a scientist in order to retrieve a cache of counterfeit currency from a crashed Nazi plane off the coast of a Caribbean republic.

E8. Missile Watch

Feb 27, 1960

Mike finds that someone has tapped the underwater cable used in monitoring a televised missile test.

E9. Jade Cavern

Mar 5, 1960

Mike rescues a diver in the Bahamas, then helps her with her research into the origin of a jade statue she owns.

E10. Expatriate's Return

Mar 12, 1960

While on patrol with the Coast Guard Auxiliary, Mike discovers a deported crime boss trying to re-enter the country, then has to rescue him from some old enemies.

E11. Strong Box

Mar 19, 1960

Mike leads the way in a salvage operation to recover more than a million dollars' worth of gems from the captain's safe of a sunken ship.

E12. The Fearmakers

Mar 26, 1960

In preparation for the visit of a foreign head of state, Mike helps the Coast Guard do a security check on the area.

E13. Revolutionary Spoils

Apr 2, 1960

A new revolutionary leader asks Mike to help him retrieve his country's hidden gold reserves, believed to have been hidden aboard a scuttled freighter by the ousted former dictator.

E14. Pirate Gold

Apr 9, 1960

While marking underwater sites for demolition by a construction company, Mike learns that a young boy is trapped in a submerged grotto that has already been mined with an explosive.

E15. The Living Fossil

Apr 16, 1960

While supervising an expedition in the Indian Ocean to find a rare coelacanth fish, Mike finds that the organizer is dangerously eager to impress his fiance.

E16. Submarine Explosion

Apr 23, 1960

Scientists risk triggering a tidal wave when they ignore Mike's warnings about the strength of the explosive charges they're using.

E17. Sacred Pool

Apr 30, 1960

Mike faces arrows and an alligator in the Mayan jungle while searching for a drug that could be a boon to medicine or a dangerous narcotic.

E18. Cindy

May 7, 1960

Mike tries to reach a little girl trapped in the air shaft of a mine located at the edge of a man-made lake, but the potential for a landslide hampers his attempt.

E19. Cross Current

May 14, 1960

Mike searches for a vanished oceanographer by retracing her charted course.

E20. Synthetic Hero

May 21, 1960

Mike discovers the wreck of a navy ship that disappeared mysteriously, and is joined by a pair of its former crew members when he dives to examine it.

E21. The Cellini Vase

May 28, 1960

Mike becomes suspicious when his hired dive on a Spanish galleon yields a rare art treasure.

E22. Target

Jun 4, 1960

While diving in Lake Ontario, Mike is sent by the Coast Guard to investigate an item that crashed into the lake nearby, which may be an enemy ICBM.

E23. Ghost Light

Jun 11, 1960

An East Indian oceanographer vanishes during a series of underwater experiments with infra-red light.

E24. Rebreather

Jun 18, 1960

Mike and an old war buddy use a new, untested ""re-breather"" to investigate an underwater missile site being constructed in the channel of a privately-owned island.

E25. Blind Spot

Jun 25, 1960

Mike helps a friend in the military with his tests of underwater radar equipment.

E26. The Replacement

Jul 2, 1960

Mike straightens out a pair of teenagers who poisoned a shark Mike had captured for Marineland.

E27. Underwater Beacon

Jul 9, 1960

While helping to test a friend's underwater radio device, Mike discovers a submerged radio beacon, camouflaged and guarded by an electric gun.

E28. Time Fuse

Jul 16, 1960

A small Latin American country calls upon Mike to help defuse a sunken munitions ship set to blow by saboteurs.

E29. Storm Drain

Jul 23, 1960

Mike goes after a newlywed teenager turned fugitive after a bungled holdup prompts him to hide in the city's storm drain system.

E30. The Invader

Jul 30, 1960

Mike trains a pair of frogmen for a rescue mission in which they will rescue their kidnapped president from an ancient fortress.