Ancient Aliens Season 21 is back on the History Channel, and fans can also stream it the next day on the History website or app.
It’s available on popular streaming platforms such as Hulu, DIRECTV Stream, Sling TV, and Philo. For those outside the US who want to watch the new season, here’s an easy guide on how to watch Ancient Aliens Season 21 outside the US.
How can I Watch Ancient Aliens Season 21 outside the US?
Follow these 5 quick steps:
- Subscribe to ExpressVPN.
- Install the VPN app on your device.
- Connect to a US-based server.
- Visit the History, Hulu, or Disney+ website and log in.
- You’re ready to watch Ancient Aliens Season 21 from anywhere!
💡 Tip: This method also works for other streaming services and TV provider logins.
Ancient Aliens Season 21 Plot
Season 21 of Ancient Aliens explores some of the most astonishing archaeological discoveries and ancient mysteries ever uncovered. The show investigates lost civilizations, strange artifacts, and advanced technologies that suggest extraterrestrial influence on human history. Experts analyze massive monuments, ancient UFO sightings, and sacred texts that hint at alien contact.
This season ranks the top ten most extraordinary discoveries, from sunken cities to ancient structures possibly linked to alien visitors. Could these findings change our understanding of human history? With fresh theories and new research, the show continues to challenge what we think we know about our origins.
When does Ancient Aliens Season 21 Premiere?
Season 21 premiered on February 7, 2025, on the History Channel, bringing all-new episodes full of groundbreaking investigations into humanity’s possible connection with extraterrestrial life.
Ancient Aliens Season 21 Cast
- Robert Clotworthy – Narrator guiding audiences through each theory and discovery.
- Giorgio Tsoukalos – Renowned ancient astronaut expert and series regular.
- Erich von Däniken – Author of Chariots of the Gods and pioneer of ancient alien theories.
- David Childress – Historian uncovering mysteries of ancient worlds.
- William Henry – Expert on mythological artifacts and ancient symbolism.
- Linda Moulton Howe – Investigative journalist specializing in UFO and extraterrestrial research.
Ancient Aliens Season 21 Episode Guide
Check out the complete episode guide below:
| Episode Title | Air Date |
|---|---|
| The Top Ten Extraordinary Discoveries | February 7, 2025 |
| The Top Ten Mysterious Monoliths | February 14, 2025 |
| The Top Ten UFO Crashes | February 21, 2025 |
| The Top Ten Unexplained Technologies | February 28, 2025 |
| The Top Ten Secret Projects | March 7, 2025 |
| The Top Ten Mysterious Mountains | March 14, 2025 |
| Mysteries of the Aztecs | March 21, 2025 |
| The Glowing Orb Phenomenon | March 28, 2025 |
| The Legacy of J. Allen Hynek | August 29, 2025 |
| The Volcano Factor | September 5, 2025 |
| The Birdman Mystery | September 12, 2025 |
| The Abduction Files | September 19, 2025 |
| The Giants | October 2, 2025 |
| Aliens In Our Midst | October 9, 2025 |
| Britain’s UFO Files | October 16, 2025 |
| Mysteries of the Norse Gods | October 23, 2025 |
| Secrets of Japan | November 6, 2025 |
| Skulls of the Gods | November 13, 2025 |
Where to Watch Ancient Aliens Season 21 in the US
As of November 6, 2025, Ancient Aliens Season 21 is available on History Channel, Hulu, Disney+, Philo, and HISTORY Vault (via Apple TV or Amazon Channels). Fans can also buy or download episodes for offline viewing through Apple TV, Fandango At Home, or Amazon Video.
Supported Devices for History Channel Streaming
- Smartphones/Tablets: iOS and Android (via App Store or Google Play)
- Streaming Devices: Roku, Amazon Fire TV, Apple TV, Android TV, Samsung Smart TVs
- Web Browsers: Watch directly on the History Channel website from any computer
