Best Observational Documentary TV Series

Looking for the best observational documentary TV series? These 13 are the highest-rated on 3eyedraven, weighted by vote count so a handful of glowing reviews never beats a proven favourite.

Seven Worlds, One Planet 2019 ★ 8.5

A Perfect Planet 2021 ★ 8.7

How the Universe Works 2010 ★ 8.3

Unsolved Mysteries 1988 ★ 7.7

The Crime of the Century 2021 ★ 7.7

History's Greatest Mysteries 2020 ★ 7.8

The Business of Drugs 2020 ★ 6.9

Spycraft 2021 ★ 6.9

NASA's Unexplained Files 2012 ★ 7.1

Ashley Madison: Sex, Lies & Scandal 2024 ★ 6.8

Simone Biles Rising 2024 ★ 6.8

The Man with 1000 Kids 2024 ★ 6.6

The Principles of Pleasure 2022 ★ 6.5