Which documentaries are must-watch?

In no particular order:

- Inside Job - https://www.imdb.com/title/tt1645089/

- Planet Earth - https://www.imdb.com/title/tt0795176/

- Restrepo - https://www.imdb.com/title/tt1559549/

- The Tillman Story - https://www.imdb.com/title/tt1568334/

- Chernobyl (??) - https://www.imdb.com/title/tt7366338/

- Hoaxed - https://www.imdb.com/title/tt8991264/

The "Seven Up" series. https://en.wikipedia.org/wiki/Up_(film_series)

From WP: Roger Ebert said that it is "an inspired, even noble, use of the film medium", that the films "penetrate to the central mystery of life", and that the series is among his top ten films of all time.

Unnatural Selection: https://www.netflix.com/title/80208910

Science Fair[1]

[1]: https://www.imdb.com/title/tt7153434/