| Episode # | Prod # | Original Air Date | Episode Title | ||
| Season One (Black & White) | |||||
| 1. | 1-1 | 6008 | 14-Sep-1964 | Eleven Days to Zero | |
| 2. | 1-2 | 7204 | 21-Sep-1964 | The City Beneath the Sea | |
| 3. | 1-3 | 7207 | 28-Sep-1964 | The Fear-Makers | |
| 4. | 1-4 | 7203 | 05-Oct-1964 | The Mist Of Silence | |
| 5. | 1-5 | 7210 | 12-Oct-1964 | The Price of Doom | |
| 6. | 1-6 | 7209 | 19-Oct-1964 | The Sky is Falling | |
| 7. | 1-7 | 7205 | 26-Oct-1964 | Turn Back the Clock | |
| 8. | 1-8 | 7202 | 02-Nov-1964 | The Village of Guilt | |
| 9. | 1-9 | 7208 | 09-Nov-1964 | Hot Line | |
| 10. | 1-10 | 7212 | 16-Nov-1964 | Submarine Sunk Here | |
| 11. | 1-11 | 7213 | 23-Nov-1964 | The Magnus Beam | |
| 12. | 1-12 | 7214 | 30-Nov-1964 | No Way Out | |
| 13. | 1-13 | 7215 | 07-Dec-1964 | The Blizzard Makers | |
| 14. | 1-14 | 7216 | 14-Dec-1964 | The Ghost of Moby Dick | |
| 15. | 1-15 | 7211 | 21-Dec-1964 | Long Live the King | |
| 16. | 1-16 | 7206 | 28-Dec-1964 | Hail to the Chief | |
| 17. | 1-17 | 7220 | 04-Jan-1965 | The Last Battle | |
| 18. | 1-18 | 7219 | 11-Jan-1965 | Mutiny | |
| 19. | 1-19 | 7217 | 18-Jan-1965 | Doomsday | |
| 20. | 1-20 | 7221 | 25-Jan-1965 | The Invaders | |
| 21. | 1-21 | 7223 | 01-Feb-1965 | The Indestructible Man | |
| 22. | 1-22 | 7223 | 08-Feb-1965 | The Buccaneer | |
| 23. | 1-23 | 7224 | 15-Feb-1965 | The Human Computer | |
| 24. | 1-24 | 7226 | 22-Feb-1965 | The Saboteur | |
| 25. | 1-25 | 7227 | 01-Mar-1965 | Cradle of the Deep | |
| 26. | 1-26 | 7229 | 08-Mar-1965 | The Amphibians | |
| 27. | 1-27 | 7228 | 15-Mar-1965 | The Exile | |
| 28. | 1-28 | 7230 | 22-Mar-1965 | The Creature | |
| 29. | 1-29 | 7231 | 29-Mar-1965 | The Enemies | |
| 30. | 1-30 | 7232 | 05-Apr-1965 | The Secret of the Loch | |
| 31. | 1-31 | 7218 | 12-Apr-1965 | The Condemned | |
| 32. | 1-32 | 7225 | 19-Apr-1965 | The Traitor | |
| Season Two (Color) | |||||
| 33. | 2-1 | 8201 | 19-Sep-1965 | Jonah and the Whale | |
| 34. | 2-2 | 8203 | 26-Sep-1965 | Time Bomb | |
| 35. | 2-3 | 8202 | 03-Oct-1965 | ...And Five of Us Are Left | |
| 36. | 2-4 | 8205 | 17-Oct-1965 | The Cyborg | |
| 37. | 2-5 | 8204 | 24-Oct-1965 | Escape from Venice | |
| 38. | 2-6 | 8207 | 31-Oct-1965 | The Left-Handed Man | |
| 39. | 2-7 | 8206 | 07-Nov-1965 | The Deadliest Game | |
| 40. | 2-8 | 8211 | 14-Nov-1965 | Leviathan | |
| 41. | 2-9 | 8212 | 21-Nov-1965 | The Peacemaker | |
| 42. | 2-10 | 8209 | 28-Nov-1965 | The Silent Saboteurs | |
| 43. | 2-11 | 8214 | 05-Dec-1965 | The X Factor | |
| 44. | 2-12 | 8215 | 12-Dec-1965 | The Machines Strike Back | |
| 45. | 2-13 | 8213 | 19-Dec-1965 | The Monster from Outer Space | |
| 46. | 2-14 | 8217 | 26-Dec-1965 | Terror on Dinosaur Island | |
| 47. | 2-15 | 8216 | 02-Jan-1966 | Killers of the Deep | |
| 48. | 2-16 | 8218 | 09-Jan-1966 | Deadly Creature Below! | |
| 49. | 2-17 | 8219 | 16-Jan-1966 | The Phantom Strikes | |
| 50. | 2-18 | 8220 | 23-Jan-1966 | The Sky's On Fire | |
| 51. | 2-19 | 8221 | 30-Jan-1966 | Graveyard of Fear | |
| 52. | 2-20 | 8222 | 06-Feb-1966 | The Shape of Doom | |
| 53. | 2-21 | 8223 | 13-Feb-1966 | Dead Men's Doubloons | |
| 54. | 2-22 | 8210 | 20-Feb-1966 | The Death Ship | |
| 55. | 2-23 | 8224 | 27-Feb-1966 | The Monster's Web | |
| 56. | 2-24 | 8225 | 06-Mar-1966 | The Menfish | |
| 57. | 2-25 | 8226 | 13-Mar-1966 | The Mechanical Man | |
| 58. | 2-26 | 8227 | 20-Mar-1966 | The Return of the Phantom | |
| Season Three | |||||
| 59. | 3-1 | 18-Sep-1966 | Monster from the Inferno | ||
| 60. | 3-2 | 25-Sep-1966 | Werewolf | ||
| 61. | 3-3 | 02-Oct-1966 | The Day the World Ended | ||
| 62. | 3-4 | 09-Oct-1966 | Night of Terror | ||
| 63. | 3-5 | 16-Oct-1966 | The Terrible Toys | ||
| 64. | 3-6 | 23-Oct-1966 | Day of Evil | ||
| 65. | 3-7 | 30-Oct-1966 | Deadly Waters | ||
| 66. | 3-8 | 06-Nov-1966 | Thing from Inner Space | ||
| 67. | 3-9 | 13-Nov-1966 | The Death Watch | ||
| 68. | 3-10 | 9209 | 20-Nov-1966 | Deadly Invasion | |
| 69. | 3-11 | 27-Nov-1966 | The Haunted Submarine | ||
| 70. | 3-12 | 04-Dec-1966 | The Plant Man | ||
| 71. | 3-13 | 11-Dec-1966 | The Lost Bomb | ||
| 72. | 3-14 | 18-Dec-1966 | The Brand of the Beast | ||
| 73. | 3-15 | 01-Jan-1967 | The Creature | ||
| 74. | 3-16 | 08-Jan-1967 | Death from the Past | ||
| 75. | 3-17 | 9217 | 15-Jan-1967 | The Heat Monster | |
| 76. | 3-18 | 22-Jan-1967 | The Fossil Men | ||
| 77. | 3-19 | 29-Jan-1967 | The Mermaid | ||
| 78. | 3-20 | 05-Feb-1967 | The Mummy | ||
| 79. | 3-21 | 12-Feb-1967 | Shadowman | ||
| 80. | 3-22 | 19-Feb-1967 | No Escape from Death | ||
| 81. | 3-23 | 26-Feb-1967 | Doomsday Island | ||
| 82. | 3-24 | 05-Mar-1967 | The Wax Men | ||
| 83. | 3-25 | 12-Mar-1967 | Deadly Cloud | ||
| 84. | 3-26 | 19-Mar-1967 | Destroy Seaview! | ||
| Season Four | |||||
| 85. | 4-1 | 17-Sep-1967 | Fires of Death | ||
| 86. | 4-2 | 01-Oct-1967 | The Deadly Dolls | ||
| 87. | 4-3 | 08-Oct-1967 | Cave of the Dead | ||
| 88. | 4-4 | 15-Oct-1967 | Journey with Fear | ||
| 89. | 4-5 | 22-Oct-1967 | Sealed Orders | ||
| 90. | 4-6 | 29-Oct-1967 | Man of Many Faces | ||
| 91. | 4-7 | 05-Nov-1967 | Fatal Cargo | ||
| 92. | 4-8 | 12-Nov-1967 | Time Lock | ||
| 93. | 4-9 | 19-Nov-1967 | Rescue | ||
| 94. | 4-10 | 26-Nov-1967 | Terror | ||
| 95. | 4-11 | 03-Dec-1967 | A Time to Die | ||
| 96. | 4-12 | 10-Dec-1967 | Blow Up | ||
| 97. | 4-13 | 17-Dec-1967 | Deadly Amphibians | ||
| 98. | 4-14 | 31-Dec-1967 | The Return of Blackbeard | ||
| 99. | 4-15 | 07-Jan-1968 | Terrible Leprechaun | ||
| 100. | 4-16 | 21-Jan-1968 | The Lobster Man | ||
| 101. | 4-17 | 28-Jan-1968 | Nightmare | ||
| 102. | 4-18 | 04-Feb-1968 | The Abominable Snowman | ||
| 103. | 4-19 | 11-Feb-1968 | Secret of the Deep | ||
| 104. | 4-20 | 18-Feb-1968 | Man-Beast | ||
| 105. | 4-21 | 25-Feb-1968 | Savage Jungle | ||
| 106. | 4-22 | 03-Mar-1968 | Flaming Ice | ||
| 107. | 4-23 | 10-Mar-1968 | Attack! | ||
| 108. | 4-24 | 17-Mar-1968 | Edge of Doom | ||
| 109. | 4-25 | 24-Mar-1968 | The Death Clock | ||
| 110. | 4-26 | 31-Mar-1968 | No Way Back | ||