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

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

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

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

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

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

An entire Mexican town is menaced by the presence of a derelict floating mine in its harbor that could ignite...

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

Mike supervises a diamond diving expedition in South America, but discovers that his employers are poaching on...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Before Mike can investigate the disappearance of a pair of skin-diving geologists, one turns up dead on the...

A grudge between two divers whom Mike is testing for underwater mining skills becomes a secondary issue when...

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