#1 | 01/07/1961Point of No Return
Mike is trapped in a ""scubasphere"" when the cable attached to it snaps.
#2 | 01/14/1961River Treasure
While surveying a remote river in the South American jungle, Mike is threatened by the jealousy of a man prospecting for emeralds with his wife.
#3 | 01/21/1961The Destroyers
Mike investigates the source of a radar jamming signal that caused two ships to collide.
#4 | 01/28/1961Vital Error
A famous newsman, convinced that he has a fatal illness, tries to end his life in such a way that his wife can collect his insurance, with Mike as a witness.
#5 | 02/04/1961The Dancer
A scuba diving ballerina faces the possibility of underwater amputation when she catches her foot between the buckled plates of a sunken freighter.
#6 | 02/11/1961Sperling of Lamatsue
After being accidentally caught in a fishing net, Mike challenges an Asiatic warlord by trying to retrieve a cache of medical supplies that the dictator has dumped into a river.
#7 | 02/18/1961Rescue
Unaware that two of his treasure-hunting friends are trapped inside, Mike sets charges to blow up a sunken ship that is a menace to a busy shipping lane.
#8 | 02/25/1961Mercy Trip
Mike scouts a path through mine-infested waters so that medical supplies can reach a China Sea port hit by a cholera epidemic.
#9 | 03/04/1961Hot Tracer
Mike's efforts to retrieve a pair of radioactive cylinders are complicated by the presence of a headstrong youth to whom he's been giving diving lessons.
#10 | 03/11/1961Sonar Story
Mike uses sonar to foil a gang of underwater heroin smugglers.
#11 | 03/18/1961Amigo
A young Mexican boy helps Mike locate a safe entrance to an underwater fossil cave.
#12 | 03/25/1961The Aquanettes
Mike faces sharks and other unexpected difficulties while working with three pretty women undergoing astronaut training.
#13 | 04/01/1961Survival Kit
Mike is hired by a local German consul to salvage a survival kit from the wreckage of a Nazi warplane in the Caribbean.
#14 | 04/08/1961Expedition
While helping his former history professor search for pirate treasure off the North Carolina coast, Mike finds evidence that the underwater cave said to house the treasure has been tampered with.
#15 | 04/15/1961Bionics
Mike convinces a reluctant daughter to continue her father's work after he is killed testing an underwater electrical detection device.
#16 | 04/22/1961The Defector
A man bribes Mike to continue giving lessons to an inept diving student whom he's stopped teaching.
#17 | 04/29/1961Niko
Mike heads a three-man team in an effort to disarm a pair of unexploded torpedoes at the bototm of a West Coast harbor.
#18 | 05/06/1961Cougar
A restless youth and a college girl complicate Mike's attempts at capturing a poisonous lionfish.
#19 | 05/13/1961Sub Hatch
A heroic test pilot from the Korean War has his mettle tested when he must spend 24 hours with Mike in a makeshift decompression chamber after a dive to prevent the bends from killing him.
#20 | 05/20/1961The Octopus Story
Markings on the body of a dead diver convince a marine biologist that a tropical lagoon is inhabited by a killer octopus.
#21 | 05/27/1961Quicksand
One salvage diver disappears while diving on a sunken yacht off the coast of Yucatan, and Mike tries to see that two others don't share his fate.
#22 | 06/03/1961Lost Island
Mike teams up with a Mexican prison escapee to uncover nefarious activity on an uncharted Pacific atoll off the coast of South America.
#23 | 06/10/1961Baby
Mike must get past Jivaro Indians who are blocking his passage downriver as he attempts to get a young missionary's baby to a hospital for medical attention.
#24 | 06/17/1961Confidential Mission
Mike poses as a tourist on vacation as he tries to locate a hidden underwater missile launcher in the Caribbean.
#25 | 06/24/1961Underwater Pirates
Pirates try to snatch a sunken freighter away from Mike before he can salvage it for an old Navy buddy.
#26 | 07/01/1961The Meet
While working for the U.S. Treasury to break a counterfeiting ring, Mike intercedes in a kidnapping.
#27 | 07/08/1961Dark Evil
A pretty woman and her father, vacationing in the Bahamas, become killers after inadvertently eating a variety of fish that causes hallucinations.
#28 | 07/15/1961Sunken Car
A sunken truck points Mike to the murder of a political boss, and the killer is the father of a good friend of Mike's.
#29 | 07/22/1961Hit and Run
Mike goes after an egocentric movie star who injured a friend of Mike's in a hit-and-fun speedboat accident.
#30 | 07/29/1961The Saint Story
While searching a Latin American harbor for a sunken statue, Mike discovers a UHF homing beacon being used to guide submarines into the port.
#31 | 08/05/1961Impostor
A dead ringer for Mike is stealing diamonds from a sunken sports cruiser, but when Mike is accused of the crime, he is unable to establish an alibi due to his current top-secret mission.
#32 | 08/12/1961Superman
While on a diving expedition in Guatemala, a woman seeking to slow down her husband's frantic lifestyle deliberately sinks the boat they share, unaware that her husband is a diabetic and his insulin supply will be lost with the vessel.
#33 | 08/19/1961Roustabout
Mike's assistant is trapped underwater by an overturned truck containing drums of poison that could endanger a South American city's water supply.
#34 | 08/26/1961P.T. Boat
Mike helps test a remote control guidance device invented by a rich eccentric.
#35 | 09/02/1961Starting Signal
A naval officer of a Caribbean nation is sabotaging a series of experiments Mike is conducting with the Coast Guard.
#36 | 09/09/1961Skipper
During hydroplane races, a friend of Mike's rams his craft into a Coast Guard ship, leaving Mike to investigate.
#37 | 09/16/1961Crime at Sea
Mike helps the daughter of his old UDT Commander investigate the man's death, which she believes was murder.
#38 | 09/23/1961Round Up
Mike must find and disarm a torpedo that's been sent into the outflow tube of a hydro-electric plant.
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