A young twenty-something diver living in the Florida Keys discovers he has the power to breathe underwater.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Menace of the Black Manta | 1967-09-09 | 15 min |
| Season 1 | Episode 2 | The Rampaging Reptile-Men | 1967-09-19 | 15 min |
| Season 1 | Episode 3 | The Return of Nepto | 1967-09-29 | 15 min |
| Season 1 | Episode 4 | The Fiery Invaders | 1967-10-09 | 15 min |
| Season 1 | Episode 5 | The Sea Raiders | 1967-10-19 | 15 min |
| Season 1 | Episode 6 | War of the Water Worlds | 1967-10-29 | 15 min |
| Season 1 | Episode 7 | The Volcanic Monster | 1967-11-08 | 15 min |
| Season 1 | Episode 8 | The Crimson Monster from the Pink Pool | 1967-11-18 | 15 min |
| Season 1 | Episode 9 | The Ice Dragon | 1967-11-28 | 15 min |
| Season 1 | Episode 10 | The Deadly Drillers | 1967-12-08 | 15 min |
| Season 1 | Episode 11 | Vassa - Queen of the Mermen | 1967-12-18 | 15 min |
| Season 1 | Episode 12 | The Microscopic Monsters | 1967-12-28 | 15 min |
| Season 1 | Episode 13 | The Onslaught of the Octomen | 1968-01-07 | 15 min |
| Season 1 | Episode 14 | Treacherous is the Torpedoman | 1968-01-17 | 15 min |
| Season 1 | Episode 15 | The Satanic Saturnians | 1968-01-27 | 15 min |
| Season 1 | Episode 16 | The Brain, the Brave and the Bold | 1968-02-06 | 15 min |
| Season 1 | Episode 17 | Where Lurks the Fisherman! | 1968-02-26 | 15 min |
| Season 1 | Episode 18 | Mephisto's Marine Marauders | 1968-03-07 | 15 min |
| Season 1 | Episode 19 | The Trio of Terror | 1968-03-17 | 15 min |
| Season 1 | Episode 20 | The Torp, the Magneto and the Claw | 1968-03-27 | 15 min |
| Season 1 | Episode 21 | Goliaths of the Deep-Sea Gorge | 1968-04-06 | 15 min |
| Season 1 | Episode 22 | The Sinister Sea Scamp | 1968-04-16 | 15 min |
| Season 1 | Episode 23 | The Devil Fish | 1968-04-26 | 15 min |
| Season 1 | Episode 24 | The Sea Scavengers | 1968-05-06 | 15 min |
| Season 1 | Episode 25 | In Captain Cuda's Clutches | 1968-05-16 | 15 min |
| Season 1 | Episode 26 | The Mirror-Man from Planet Imago | 1968-05-26 | 15 min |
| Season 1 | Episode 27 | The Sea Sorcerer | 1968-06-05 | 15 min |
| Season 1 | Episode 28 | The Sea-Snares of Captain Sly | 1968-06-15 | 15 min |
| Season 1 | Episode 29 | The Undersea Trojan Horse | 1968-06-25 | 15 min |
| Season 1 | Episode 30 | The Vicious Villainy of Vassa | 1968-07-05 | 15 min |
| Season 1 | Episode 31 | Programmed for Destruction | 1968-07-15 | 15 min |
| Season 1 | Episode 32 | The War of the Quatix and the Bimphars | 1968-07-25 | 15 min |
| Season 1 | Episode 33 | The Stickmen of Stygia | 1968-08-04 | 15 min |
| Season 1 | Episode 34 | Three Wishes to Trouble | 1968-08-14 | 15 min |
| Season 1 | Episode 35 | The Silver Sphere | 1968-08-24 | 15 min |
| Season 1 | Episode 36 | To Catch a Fisherman | 1968-09-03 | 15 min |
