Ancient Aliens: Season 21
This season started on Feb 7, 2025. The table lists episodes with recorded air dates up to Sep 27, 2026.
| Ep | Title and air date | My place |
|---|---|---|
| 1 | The Top Ten Extraordinary Discoveries · 42 min | |
| 2 | The Top Ten Mysterious Monoliths · 42 min | |
| 3 | The Top Ten UFO Crashes · 42 min | |
| 4 | The Top Ten Unexplained Technologies · 42 min | |
| 5 | The Top Ten Secret Projects · 60 min | |
| 6 | The Top Ten Mysterious Mountains · 60 min | |
| 7 | Mysteries of the Aztecs · 60 min | |
| 8 | The Glowing Orb Phenomenon · 60 min | |
| 9 | The Legacy of J. Allen Hynek · 60 min | |
| 10 | The Volcano Factor · 60 min | |
| 11 | The Birdman Mystery · 60 min | |
| 12 | The Abduction Files · 60 min | |
| 13 | The Giants · 60 min | |
| 14 | Aliens in Our Midst · 60 min | |
| 15 | Britain's UFO Files · 60 min | |
| 16 | Mysteries of the Norse Gods · 60 min | |
| 17 | Secrets of Japan · 60 min |
