UK TV · Sky History
Top Secret UFO Projects Declassified: all seasons, episodes and where it airs in the UK
Quick answer · UK
Top Secret UFO Projects Declassified is a UK documentary series on Sky History, which ran from 2021, with 1 season and 6 episodes.
Top Secret UFO Projects Declassified has ended; its final episode aired on Tuesday, February 23, 2021.
Top Secret UFO Projects Declassified seasons (1 season, 6 episodes)
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 6 | January 19, 2021 | February 23, 2021 |
Original UK air dates on Sky History.
Common questions
How many seasons of Top Secret UFO Projects Declassified are there?
Top Secret UFO Projects Declassified has 1 season and 6 episodes, first airing on Tuesday, January 19, 2021.
Has Top Secret UFO Projects Declassified ended?
Top Secret UFO Projects Declassified has ended; its final episode aired on Tuesday, February 23, 2021.
What channel is Top Secret UFO Projects Declassified on in the UK?
Top Secret UFO Projects Declassified aired on Sky History. Past episodes are often available on the broadcaster's own catch-up app.
Source: TVmaze (CC BY-SA), retrieved October 7, 2026.