Season 4
18 episodes · Jan 7, 1961
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- S4E1
Point of No Return
Jan 7, 1961Mike is trapped in a ""scubasphere"" when the cable attached to it snaps.
- S4E2
River Treasure
Jan 14, 1961While surveying a remote river in the South American jungle, Mike is threatened by the jealousy of a man prospecting for emeralds with his wife.
- S4E3
The Destroyers
Jan 21, 1961Mike investigates the source of a radar jamming signal that caused two ships to collide.
- S4E4
Vital Error
Jan 28, 1961A 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.
- S4E5
The Dancer
Feb 4, 1961A scuba diving ballerina faces the possibility of underwater amputation when she catches her foot between the buckled plates of a sunken freighter.
- S4E6
Sperling of Lamatsue
Feb 11, 1961After 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.
- S4E7
Rescue
Feb 18, 1961Unaware 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.
- S4E8
Mercy Trip
Feb 25, 1961Mike scouts a path through mine-infested waters so that medical supplies can reach a China Sea port hit by a cholera epidemic.
- S4E9
Hot Tracer
Mar 4, 1961Mike'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.
- S4E11
Amigo
Mar 18, 1961A young Mexican boy helps Mike locate a safe entrance to an underwater fossil cave.
- S4E12
The Aquanettes
Mar 25, 1961Mike faces sharks and other unexpected difficulties while working with three pretty women undergoing astronaut training.
- S4E13
Survival Kit
Apr 1, 1961Mike is hired by a local German consul to salvage a survival kit from the wreckage of a Nazi warplane in the Caribbean.
- S4E14
Expedition
Apr 8, 1961While 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.
- S4E15
Bionics
Apr 15, 1961Mike convinces a reluctant daughter to continue her father's work after he is killed testing an underwater electrical detection device.
- S4E16
The Defector
Apr 22, 1961A man bribes Mike to continue giving lessons to an inept diving student whom he's stopped teaching.
- S4E17
Niko
Apr 29, 1961Mike heads a three-man team in an effort to disarm a pair of unexploded torpedoes at the bototm of a West Coast harbor.
- S4E18
Cougar
May 6, 1961A restless youth and a college girl complicate Mike's attempts at capturing a poisonous lionfish.