| Title | Season | Episode # | First Aired |
|---|---|---|---|
| The Final Challenge | 3 | 12 | November 25, 1978 |
| The Garden of Doom | 6 | 23 | November 1, 1980 |
| The Ghost | 2 | 59 | December 17, 1977 |
| The Ghost Ship | 10 | 2 | September 18, 1985 |
| The Giants Of Doom | 3 | 7 | October 21, 1978 |
| The Haunted House | 6 | 11 | October 4, 1980 |
| The Ice Demon | 6 | 2 | September 13, 1980 |
| The Incredible Crude Oil Monster | 6 | 12 | October 4, 1980 |
| The Incredible Space Circus | 4 | 12 | November 25, 1978 |
| The Invasion of the Space Dolls | 8 | 8 | September 24, 1983 |
| The Invisible Menace | 2 | 25 | October 22, 1977 |
| The Iron Cyclops | 7 | 13 | October 24, 1981 |
| The Killer Machines | 6 | 22 | November 1, 1980 |
| The Krypton Syndrome | 8 | 7 | September 24, 1983 |
| The Lava Men | 7 | 10 | October 17, 1981 |
| The Lion Men | 2 | 43 | November 19, 1977 |
| The Lord of Middle Earth | 5 | 4 | October 13, 1979 |
| The Make Up Monster | 6 | 3 | September 13, 1980 |
| The Malusian Blob | 8 | 18 | October 15, 1983 |
| The Man Beasts Of Xra | 2 | 45 | November 26, 1977 |
| The Man in the Moon | 6 | 16 | October 18, 1980 |
| The Marsh Monster | 2 | 53 | December 10, 1977 |
| The Mask of Mystery | 9 | 8 | September 29, 1984 |
| The Menace Of The White Dwarf | 1 | 12 | November 24, 1973 |
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