Ancient Aliens - Season 21
| 1 |  |
The Top Ten Extraordinary Discoveries 07-02-2025 | |
| 2 |  |
The Top Ten Mysterious Monoliths 14-02-2025 | |
| 3 |  |
The Top Ten UFO Crashes 21-02-2025 | |
| 4 |  |
The Top Ten Unexplained Technologies 28-02-2025 | |
| 5 |  |
The Top Ten Secret Projects 07-03-2025 | |
| 6 |  |
The Top Ten Mysterious Mountains 14-03-2025 | |
| 7 |  |
Mysteries of the Aztecs 21-03-2025 | |
| 8 |  |
The Glowing Orb Phenomenon 28-03-2025 | |
| 9 |  |
The Legacy of J. Allen Hynek 29-08-2025 | |
| 10 |  |
The Volcano Factor 05-09-2025 | |
| 11 |  |
The Birdman Mystery 12-09-2025 | |
| 12 |  |
The Abduction Files 19-09-2025 | |
| 13 |  |
The Giants 02-10-2025 | |
| 14 |  |
Aliens In Our Midst 09-10-2025 | |
| 15 |  |
Britain's UFO Files 16-10-2025 | |
| 16 |  |
Mysteries Of The Norse Gods 23-10-2025 | |
| 17 |  |
Secrets of Japan 06-11-2025 | |
| 18 |  |
Episode 18 | |
| 19 | |
Episode 19 | |
| 20 | |
Episode 20 |
