Episode Ratings Grid

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Great

Episode Power Rankings

The peaks and the valleys. Find the essential episodes — and the ones to skip.

#1
S1E3 8.7
Arctic: Life in the Deep Freeze

Welcome to the Arctic: months of darkness, frigid temperatures, little food to be found or grown. Despite this, four million people live their lives in this environment. Meet them and witness their remarkable tales of survival in the world's harshest climate.

#2
S1E4 8.7
Jungles: People of the Trees

The rainforest is home to more species of plants and animals than any other habitat on the planet. For the humans who call this environment home, life requires skill, ingenuity, and sheer bravery.

#3
S1E1 8.6
Oceans: Into the Blue

As an air-breathing animal, man is ill-suited to living in watery environments. Nonetheless, people in certain cultures have found ways to live an almost aquatic life in order to exploit the vast riches of the sea.

#4 Mountains: Life in Thin Air S1E5 8.6
#5 Rivers: Friend and Foe S1E7 8.5
#6 Deserts: Life in the Furnace S1E2 8.4
#7 Grasslands: The Roots of Power S1E6 8.4
#8 Cities: Surviving the Urban Jungle S1E8 8.1

Lowlights

#8 S1E8 Cities: Surviving the Urban Jungle 8.1

A look at the man-made environment: the city. Over half of the world's population now lives in the urban jungle. The city is built to keep untamed nature out - but nature can't be pushed away. From bed bugs sucking blood at night to rats in our restaurants, many animals have adapted to a life in man's creation.

#7 Grasslands: The Roots of Power S1E6 8.4
#6 Deserts: Life in the Furnace S1E2 8.4
#5 Rivers: Friend and Foe S1E7 8.5
#4 Mountains: Life in Thin Air S1E5 8.6

The Quality Arc

Each point is an episode, plotted in order. Colored bands mark season boundaries. Look for the rise, the plateau, or the decline.

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Episode Engagement

High votes + high rating = beloved classic. High votes + low rating = notorious stinker. Low votes + high rating = hidden gem.

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