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Life on Our Planet

Season 1, Episode 4· Chapter 4: In Cold Blood

After Earth's third mass extinction, mammals' surviving ancestors ruled the supercontinent Pangea. But lizards soon ushered in the age of reptiles.

Episodes

1Chapter 1: The Rules of Life 2Chapter 2: The First Frontier 3Chapter 3: Invaders of the Land 4Chapter 4: In Cold Blood 5Chapter 5: In the Shadow of Giants 6Chapter 6: Out of the Ashes 7Chapter 7: Inheriting the Earth 8Chapter 8: Age of Ice and Fire