Episode 01: Menace of the Black Manta/The Rampaging Reptile-Men/Between Two Armies Episode 02: The Return of Nepto/The Fiery Invaders/Target Earth Episode 03: The Sea Raiders/War of the Water Worlds/Bad Day on Black Mountain Episode 04: The Volcanic Monster/The Crimson Monster from the Pink Pool/Invasion of the Beetle Men Episode 05: The Ice Dragon/The Deadly Drillers/The Plant Master Episode 06: Vassa - Queen of the Mermen/The Microscopic Monsters/The House of Doom Episode 07: The Onslaught on the Octomen/Treacherous Is the Torpedoman/The Monster Machine Episode 08: The Satanic Saturnians/The Brain, the Brave and the Bold/The Space Beast Round-Up Episode 09: Where Lurks the Fisherman/Mephisto's Marine Marauders/Operation Rescue Episode 10: The Trio of Terror/The Torp, the Magneto, and the Claw/The Chemo-Creature Episode 11: Goliaths of the Deep-Sea Gorge/The Sinister Sea Scamp/Take a Giant Step Episode 12: The Devil Fish/The Sea Scavengers/To Catch a Blue Bolt Episode 13: In Captain Cuda's Clutches/The Mirror-Man from the Planet Imago/Peril from Pluto Episode 14: The Sea Sorcerer/The Sea-Snares of Captain Sly/A Visit to Venus Episode 15: The Undersea Trojan Horse/The Vicious Villainy of Vassa/The Twenty-Third Dimension Episode 16: Programmed by Destruction/The War of the Quatix and the Bimphars/Evil Is as Evil Does Episode 17: The Stickman of Stygia/Three Wishes to Trouble/The Vanishing World Episode 18: The Silver Sphere/To Catch a Fisherman/Sirena, Empress of Evil