

Documentary
The Best Episodes of Cities of the Underworld Season 4
Every episode of Cities of the Underworld Season 4 ranked from best to worst. Discover the Best Episodes of Cities of the Underworld Season 4!

Documentary
The Best Episodes of Cities of the Underworld Season 4
Every episode of Cities of the Underworld Season 4 ranked from best to worst. Discover the Best Episodes of Cities of the Underworld Season 4!
Don Wildman travels to the farthest and deepest reaches of the globe, using cutting-edge technology to explore mysteries buried deep underground.
Seasons4
Season 4 Ratings Summary
"Mayan Apocalypse" is the best rated episode of "Cities of the Underworld" season 4. It scored 6.6/10 based on 18 votes. Directed by Unknown and written by Unknown, it aired on 9/7/2021. This episode is rated 0.4 points higher than the second-best, "America's Military Underground".