Every season of Monsters of the Deep: 20,000 Leagues Under the Sea ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Monsters of the Deep: 20,000 Leagues Under the Sea!

Exploring the undersea world of deep-sea killers like the Anglerfish, Dunkleosteus, and Stoplight Loose-Jaw, with expert insights from the likes of Steve Backshall.

The Killers

Exploring deep-sea giants with rare creatures like the giant squid, Megalodon, and Cookiecutter shark. Steve Backshall uncovers hidden ocean monsters and new discoveries like Ichthyotitan.

Giants of the Abyss

Exploring the world of deep-sea killers, revealing mysterious creatures with amazing CGI.

The Best Seasons of Monsters of the Deep: 20,000 Leagues Under the Sea

The Best Seasons of Monsters of the Deep: 20,000 Leagues Under the Sea

Season 1