Season 1 (1967)
7.30 avg 18 episodes 7.4 → 7.4 22 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Menace of the Black Manta/The Rampaging Reptile-Men/Between Two Armies | 7.4 | 87 |
| 2 | The Return of Nepto/The Fiery Invaders/Target Earth | 7.3 | 67 |
| 3 | The Sea Raiders/War of the Water Worlds/Bad Day on Black Mountain | 7.1 | 61 |
| 4 | The Volcanic Monster/The Crimson Monster from the Pink Pool/Invasion of the Beetle Men | 7.5 | 60 |
| 5 | The Ice Dragon/The Deadly Drillers/The Plant Master | 6.4 | 59 |
| 6 | Vassa - Queen of the Mermen/The Microscopic Monsters/The House of Doom | 7.7 | 59 |
| 7 | The Onslaught on the Octomen/Treacherous Is the Torpedoman/The Monster Machine | 7.0 | 57 |
| 8 | The Satanic Saturnians/The Brain, the Brave and the Bold/The Space Beast Round-Up | 7.2 | 55 |
| 9 | Where Lurks the Fisherman/Mephisto's Marine Marauders/Operation Rescue | 7.6 | 57 |
| 10 | The Trio of Terror/The Torp, the Magneto, and the Claw/The Chemo-Creature | 7.4 | 53 |
| 11 | Goliaths of the Deep-Sea Gorge/The Sinister Sea Scamp/Take a Giant Step | 7.4 | 54 |
| 12 | The Devil Fish/The Sea Scavengers/To Catch a Blue Bolt | 7.2 | 55 |
| 13 | In Captain Cuda's Clutches/The Mirror-Man from the Planet Imago/Peril from Pluto | 7.4 | 55 |
| 14 | The Sea Sorcerer/The Sea-Snares of Captain Sly/A Visit to Venus | 7.6 | 54 |
| 15 | The Undersea Trojan Horse/The Vicious Villainy of Vassa/The Twenty-Third Dimension | 7.2 | 54 |
| 16 | Programmed by Destruction/The War of the Quatix and the Bimphars/Evil Is as Evil Does | 7.7 | 54 |
| 17 | The Stickman of Stygia/Three Wishes to Trouble/The Vanishing World | 6.9 | 56 |
| 18 | The Silver Sphere/To Catch a Fisherman/Sirena, Empress of Evil | 7.4 | 59 |