Mike takes on the dangerous task of rescuing a political refugee, who is in an embassy and hiding from a Latin American dictator.

Mike battles a murderous style pirate, while working in the Bahamas as an underwater photographer for a famous bathing suit designer.

With the use of an underwater camera fitted with a periscope lens, Mike helps agents round up members of an organized crime syndicate.

Mike takes command of the first underwater flotilla of the United States Coast Guard Auxillary in search of sunken radioactive cargo.

Mike helps the US Coast Guard in trapping enemy agents that are dropping microfilm canisters in an underwater cave.

Mike's assignment: Retrieve a deadly radioactive capsule and restore it to a lead container without exposing himself to gamma radiation that could take his life.

Mike's vacation in The Bahamas is interrupted by the US Secret Service. They need him to search for two-million counterfeit dollars stashed at the bottom of the ocean.

Mike tangles with enemy frogmen, while participating in a US Navy inspection of an underwater camera cable.

Mike rescues a girl diver who is trying to trace the origin of a jade statue she owns. He joins the search and is rewarded with an attack on his life.

While on patrol with the U.S. Coast Guard Auxiliary, Mike becomes entangled with an exiled crime boss, who is trying to slip back into the country.

A thief endangers lives to secure a fortune in gems buried in the safe of a sunken ship.

When a dictator visiting the United States decides to land at a small harbor with almost no advance notice, Mike is called in by the Coast Guard for an underwater security check.

Mike gets involved with helping foreign revolutionaries overthrow their dictator.

Mike races against time to rescue a 12-year-old boy trapped in an underwater grotto, rigged with explosives.

Mike joins a diving expedition in search of a prehistoric fish thought to be extinct for millions of years.

Things go terribly wrong for Mike, while he is involved in planting underwater explosives in the ocean's floor.

Mike travels deep into the jungle areas of a small Latin-American country in search of a sacred pool of water and its secrets held within.

Mike attempts a risky rescue of a young girl trapped inside an underwater mine.

Mike searches underwater for a missing female scientist friend.

Mike investigates the wreck of a sunken Navy ship.

Mike becomes suspicious of his employer, whom has hired him to search a three-century-old sunken Spanish galleon.

After a mysterious radioactive object crashes into the ocean floor, Mike must dive to discover just what it is.

While performing experimental underwater research utilizing infra-red light, a diver goes missing.

Mike takes on a dangerous spy mission while vacationing in the Caribbean.

The US Coast Guard enlists Mike's help in determining the cause of sabotage to the radar of the coastal warning system.

Mike Nelson decides to teach two shark-killing juvenile delinquents a lesson - in catching a live shark.

Mike investigates a mysterious signal emanating from the ocean's floor.

Sabbateurs have rigged a sunken ship with 50 tons of dynamite, and it's Mike's job to diffuse the monstrous time-bomb before it blows up an entire foreign nation's capital.

Mike attempts a risky rescue of a young criminal trapped in a storm drain.

Mike is retained by a small Latin American country to train a cadre of underwater demolition experts. Mike and his team spring into action when the country's president is kidnapped.

Mike comes to the aid of his old diving instructor, whom is now getting too old to make dangerous dives.

Mike investigates the mysterious drowning death of the inventor of an advanced rebreather device.

Mike gets mixed up with two scientists trying to examine fossils from the sea.

Mike tangles with divers growing a hybrid form of marijuana under water.

Mike searches underwater for enemy scanning devices being utilized to jam American satellite signals.

Mike attempts to rescue a movie starlet trapped underwater aboard a ship, which is flooded after a special effects dynamite blast.

The US Coast Guard recruits Mike to search for a missing missile on the ocean floor.

Mike attempts to recover a Top Secret diplomatic pouch lost in hostile foreign waters.

Mike investigates the mysterious disappearance of a man gone overboard only a half-mile from shore.