Seasons & episodes

A man planning to murder his wife hires Mike to teach her to scuba dive so that he may lure her into a dangerous underwater current.

Mike is hired to dive on a sunken freighter in New York Harbor in the hopes that some crew members may still be alive in air pockets.

While checking the underwater security of a new dam, Mike discovers a bomb that has been placed in an intake valve.

In an effort to prevent a dock fire from igniting chemicals stored in a warehouse, Mike swims into the building through an intake pipe.

Drug smugglers force Mike at gunpoint to help them retrieve a sunken shipment of narcotics.

After discovering a sunken Japanese submarine, the amateur skin diver who found it goes violently berserk.

Mike investigates the deaths of a pair of divers who were murdered after discovering a sunken yacht laden with jewels.

While looking into the possibility of linking two Latin American lakes by a canal, Mike runs afoul of rebel guerillas.

Mike discovers a submarine off the Panama coast that is a base of operations for divers planning to destroy the Panama Canal.

A Greek sponge diver and his pretty girlfriend lay a minefield for Mike, fearful that he will interfere with their discovery of a valuable statue on the Mediterranean seabed.

A man tricks a scientist into dropping a top-secret folio overboard, where a confederate can retrieve it.

Mike attempts to rescue a geologist who has been trapped in an underwater cave by a sudden landslide.

Mike investigates the mysterious death of the featured performer in a water ski show during the act's underwater finale.

Mike and a pair of archaeologists risk the anger and booby traps of islanders while exploring underwater caves in the Caribbean.

Latin American revolutionaries recruit Mike to recover the body of their murdered leader from the palace lagoon in order to ignite an uprising.

A young skindiver is found murdered after stealing lobsters from an elderly fisherman as an initiation stunt.

Mike defies tales of a mysterious sea serpent when he searches for a shipment of stolen liquid explosives in Arabia.

After one of their number is wounded in the robbery of a beach side casino, a team of thieves kidnap a doctor's wife in order to lure the physician into a trap.

A freak accident endangers a man's life during the test of Mike's new method of retrieving sunken ICBM nose cones.

A beautiful woman plots revenge against Mike after flunking out of his class for scuba diver instructors.

Mike tries to break a ring of drug traffickers who are smuggling heroin into the country in ballast tanks.

Someone attempts to kill Mike while he's scouting out a site for an underwater marine preserve.

Mike is recruited to train a pair of divers for an urgent secret assignment.

Mike uses an underwater TV camera setup to nab thieves who are robbing a Hawaiian girl's pearl beds.