Season 1 (1966)
6.30 avg 20 episodes 7.1 → 7.5 21 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | The Heat Thing/The Worm People/Zorak | 7.1 | 82 |
| 2 | Creature King/The Treeman/The Lizard Slavers | 7.0 | 54 |
| 3 | The Web/The Sacrifice/Homing Device | 6.3 | 46 |
| 4 | The Drone/The Moss Men/The Sandman | 5.1 | 45 |
| 5 | The Robot Master/Marooned/The Energy Monster | 6.8 | 43 |
| 6 | Hi-Jackers/Giant Ants/The Lure | 5.0 | 43 |
| 7 | The Schemer/The Rock Pygmies/The Evil Collector | 6.4 | 40 |
| 8 | Lokar - King of the Killer Locusts/Danger River/Brago | 6.6 | 40 |
| 9 | The Cylopeds/The Fire God/Space Sargasso | 6.8 | 37 |
| 10 | The Iceman/The Vampire Men/The Time Machine | 5.4 | 40 |
| 11 | Space Birds/The Wolf People/Attack of the Saucer Crab | 6.0 | 31 |
| 12 | Nightmare Planet/Valley of the Giants/Space Armada | 5.7 | 35 |
| 13 | Space Armada/The Vampire Men/The Challenge | 7.0 | 34 |
| 14 | Jungle Planet/The Marksman/Revenge of the Spider Woman | 6.9 | 33 |
| 15 | Glasstor/The Space Ark/The Terrible Chase | 5.9 | 32 |
| 16 | The Sorcerer/The Spear Warriors/The Space Piranhas | 6.4 | 31 |
| 17 | The Ovens of Moltor/The Ant Warriors/Transor - The Matter Mover | 4.7 | 32 |
| 18 | The Gargoyloids/The Looters/The Mighty Snow Creature | 6.1 | 33 |
| 19 | The Meeting/Clutches of Creature King/The Deadly Trap | 7.3 | 34 |
| 20 | The Molten Monsters of Moltar/Two Faces of Doom/The Final Encounter | 7.5 | 36 |
