UK TV · 5
Building the Impossible: all seasons, episodes and where it airs in the UK
Quick answer · UK
Building the Impossible is a UK documentary series on 5, running since 2021, with 3 seasons and 12 episodes.
Building the Impossible is still running; the latest episode aired on Friday, April 10, 2026.
Building the Impossible seasons (3 seasons, 12 episodes)
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 3 | September 17, 2021 | October 1, 2021 |
| Season 2 | 3 | April 29, 2022 | May 13, 2022 |
| Season 3 | 6 | October 28, 2022 | April 10, 2026 |
Original UK air dates on 5.
Common questions
How many seasons of Building the Impossible are there?
Building the Impossible has 3 seasons and 12 episodes, first airing on Friday, September 17, 2021.
Is Building the Impossible still on?
Building the Impossible is still running; the latest episode aired on Friday, April 10, 2026.
What channel is Building the Impossible on in the UK?
Building the Impossible airs on 5. Past episodes are often available on the broadcaster's own catch-up app.
Who stars in Building the Impossible?
The main cast includes Rob Bell.
Source: TVmaze (CC BY-SA), retrieved October 7, 2026.