Join the crew of the Seaview aboard their super high-tech submarine, where no mission is too dangerous and no threat is too deadly, be it enemy agents, mad scientists, deadly sea creatures, or impending nuclear disaster.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Eleven Days to Zero | 1964-09-14 | 60 min |
| Season 1 | Episode 2 | The City Beneath the Sea | 1964-09-21 | 60 min |
| Season 1 | Episode 3 | The Fear-Makers | 1964-09-28 | 60 min |
| Season 1 | Episode 4 | The Mist of Silence | 1964-10-05 | 60 min |
| Season 1 | Episode 5 | The Price of Doom | 1964-10-12 | 60 min |
| Season 1 | Episode 6 | The Sky is Falling | 1964-10-19 | 60 min |
| Season 1 | Episode 7 | Turn Back the Clock | 1964-10-26 | 60 min |
| Season 1 | Episode 8 | The Village of Guilt | 1964-11-02 | 60 min |
| Season 1 | Episode 9 | Hot Line | 1964-11-09 | 60 min |
| Season 1 | Episode 10 | Submarine Sunk Here | 1964-11-16 | 60 min |
| Season 1 | Episode 11 | The Magnus Beam | 1964-11-23 | 60 min |
| Season 1 | Episode 12 | No Way Out | 1964-11-30 | 60 min |
| Season 1 | Episode 13 | The Blizzard Makers | 1964-12-07 | 60 min |
| Season 1 | Episode 14 | The Ghost of Moby Dick | 1964-12-14 | 60 min |
| Season 1 | Episode 15 | Long Live the King | 1964-12-21 | 60 min |
| Season 1 | Episode 16 | Hail to the Chief | 1964-12-28 | 60 min |
| Season 1 | Episode 17 | The Last Battle | 1965-01-04 | 60 min |
| Season 1 | Episode 18 | Mutiny | 1965-01-11 | 60 min |
| Season 1 | Episode 19 | Doomsday | 1965-01-18 | 60 min |
| Season 1 | Episode 20 | The Invaders | 1965-01-25 | 60 min |
| Season 1 | Episode 21 | The Indestructible Man | 1965-02-01 | 50 min |
| Season 1 | Episode 22 | The Buccaneer | 1965-02-08 | 60 min |
| Season 1 | Episode 23 | The Human Computer | 1965-02-15 | 60 min |
| Season 1 | Episode 24 | The Saboteur | 1965-02-22 | 50 min |
| Season 1 | Episode 25 | Cradle of the Deep | 1965-03-01 | 50 min |
| Season 1 | Episode 26 | The Amphibians | 1965-03-08 | 50 min |
| Season 1 | Episode 27 | The Exile | 1965-03-15 | 50 min |
| Season 1 | Episode 28 | The Creature | 1965-03-22 | 50 min |
| Season 1 | Episode 29 | The Enemies | 1965-03-29 | 60 min |
| Season 1 | Episode 30 | The Secret of the Loch | 1965-04-05 | 60 min |
| Season 1 | Episode 31 | The Condemned | 1965-04-12 | 60 min |
| Season 1 | Episode 32 | The Traitor | 1965-04-19 | 60 min |
| Season 2 | Episode 1 | Jonah and the Whale | 1965-09-19 | 60 min |
| Season 2 | Episode 2 | Time Bomb | 1965-09-26 | 60 min |
| Season 2 | Episode 3 | ...And Five of Us Are Left | 1965-10-03 | 60 min |
| Season 2 | Episode 4 | The Cyborg | 1965-10-17 | 60 min |
| Season 2 | Episode 5 | Escape from Venice | 1965-10-24 | 60 min |
| Season 2 | Episode 6 | The Left-Handed Man | 1965-10-31 | 60 min |
| Season 2 | Episode 7 | The Deadliest Game | 1965-11-07 | 60 min |
| Season 2 | Episode 8 | Leviathan | 1965-11-14 | 60 min |
| Season 2 | Episode 9 | The Peacemaker | 1965-11-21 | 60 min |
| Season 2 | Episode 10 | The Silent Saboteurs | 1965-11-28 | 50 min |
| Season 2 | Episode 11 | The X Factor | 1965-12-05 | 60 min |
| Season 2 | Episode 12 | The Machines Strike Back | 1965-12-12 | 60 min |
| Season 2 | Episode 13 | The Monster from Outer Space | 1965-12-19 | 60 min |
| Season 2 | Episode 14 | Terror on Dinosaur Island | 1965-12-26 | 60 min |
| Season 2 | Episode 15 | Killers of the Deep | 1966-01-02 | 50 min |
| Season 2 | Episode 16 | Deadly Creature Below! | 1966-01-09 | 60 min |
| Season 2 | Episode 17 | The Phantom Strikes | 1966-01-16 | 50 min |
| Season 2 | Episode 18 | The Sky's on Fire | 1966-01-23 | 50 min |
| Season 2 | Episode 19 | Graveyard of Fear | 1966-01-30 | 50 min |
| Season 2 | Episode 20 | The Shape of Doom | 1966-02-06 | 50 min |
| Season 2 | Episode 21 | Dead Men's Doubloons | 1966-02-13 | 50 min |
| Season 2 | Episode 22 | The Death Ship | 1966-02-20 | 50 min |
| Season 2 | Episode 23 | The Monster's Web | 1966-02-27 | 50 min |
| Season 2 | Episode 24 | The Menfish | 1966-03-06 | 60 min |
| Season 2 | Episode 25 | The Mechanical Man | 1966-03-13 | 60 min |
| Season 2 | Episode 26 | The Return of the Phantom | 1966-03-20 | 50 min |
| Season 3 | Episode 1 | Monster from the Inferno | 1966-09-18 | 60 min |
| Season 3 | Episode 2 | Werewolf | 1966-09-25 | 60 min |
| Season 3 | Episode 3 | The Day the World Ended | 1966-10-02 | 60 min |
| Season 3 | Episode 4 | Night of Terror | 1966-10-09 | 60 min |
| Season 3 | Episode 5 | The Terrible Toys | 1966-10-16 | 60 min |
| Season 3 | Episode 6 | Day of Evil | 1966-10-23 | 60 min |
| Season 3 | Episode 7 | Deadly Waters | 1966-10-30 | 60 min |
| Season 3 | Episode 8 | Thing from Inner Space | 1966-11-06 | 60 min |
| Season 3 | Episode 9 | The Death Watch | 1966-11-13 | 60 min |
| Season 3 | Episode 10 | Deadly Invasion | 1966-11-20 | 60 min |
| Season 3 | Episode 11 | The Haunted Submarine | 1966-11-27 | 60 min |
| Season 3 | Episode 12 | The Plant Man | 1966-12-04 | 60 min |
| Season 3 | Episode 13 | The Lost Bomb | 1966-12-11 | 60 min |
| Season 3 | Episode 14 | The Brand of the Beast | 1966-12-18 | 60 min |
| Season 3 | Episode 15 | The Creature | 1967-01-01 | 60 min |
| Season 3 | Episode 16 | Death from the Past | 1967-01-08 | 60 min |
| Season 3 | Episode 17 | The Heat Monster | 1967-01-15 | 50 min |
| Season 3 | Episode 18 | The Fossil Men | 1967-01-22 | 50 min |
| Season 3 | Episode 19 | The Mermaid | 1967-01-29 | 60 min |
| Season 3 | Episode 20 | The Mummy | 1967-02-05 | 60 min |
| Season 3 | Episode 21 | Shadowman | 1967-02-12 | 60 min |
| Season 3 | Episode 22 | No Escape from Death | 1967-02-19 | 50 min |
| Season 3 | Episode 23 | Doomsday Island | 1967-02-26 | 60 min |
| Season 3 | Episode 24 | The Wax Men | 1967-03-05 | 50 min |
| Season 3 | Episode 25 | Deadly Cloud | 1967-03-12 | 60 min |
| Season 3 | Episode 26 | Destroy Seaview! | 1967-03-19 | 60 min |
| Season 4 | Episode 1 | Fires of Death | 1967-09-17 | 60 min |
| Season 4 | Episode 2 | The Deadly Dolls | 1967-10-01 | 60 min |
| Season 4 | Episode 3 | Cave of the Dead | 1967-10-08 | 60 min |
| Season 4 | Episode 4 | Journey with Fear | 1967-10-15 | 60 min |
| Season 4 | Episode 5 | Sealed Orders | 1967-10-22 | 60 min |
| Season 4 | Episode 6 | Man of Many Faces | 1967-10-29 | 60 min |
| Season 4 | Episode 7 | Fatal Cargo | 1967-11-05 | 60 min |
| Season 4 | Episode 8 | Time Lock | 1967-11-12 | 60 min |
| Season 4 | Episode 9 | Rescue | 1967-11-19 | 60 min |
| Season 4 | Episode 10 | Terror | 1967-11-26 | 60 min |
| Season 4 | Episode 11 | A Time to Die | 1967-12-03 | 60 min |
| Season 4 | Episode 12 | Blow Up | 1967-12-10 | 60 min |
| Season 4 | Episode 13 | Deadly Amphibians | 1967-12-17 | 60 min |
| Season 4 | Episode 14 | The Return of Blackbeard | 1967-12-31 | 60 min |
| Season 4 | Episode 15 | Terrible Leprechaun | 1968-01-07 | 60 min |
| Season 4 | Episode 16 | The Lobster Man | 1968-01-21 | 60 min |
| Season 4 | Episode 17 | Nightmare | 1968-01-28 | 60 min |
| Season 4 | Episode 18 | The Abominable Snowman | 1968-02-04 | 60 min |
| Season 4 | Episode 19 | Secret of the Deep | 1968-02-11 | 60 min |
| Season 4 | Episode 20 | Man-Beast | 1968-02-18 | 60 min |
| Season 4 | Episode 21 | Savage Jungle | 1968-02-25 | 60 min |
| Season 4 | Episode 22 | Flaming Ice | 1968-03-03 | 60 min |
| Season 4 | Episode 23 | Attack! | 1968-03-10 | 60 min |
| Season 4 | Episode 24 | Edge of Doom | 1968-03-17 | 60 min |
| Season 4 | Episode 25 | The Death Clock | 1968-03-24 | 60 min |
| Season 4 | Episode 26 | No Way Back | 1968-03-31 | 60 min |
