Montana, USA- 65,5 million years B.C. In the last days of the dinosaurs' hegemony over the world, a female Tyrannosaurus struggles to reproduce in a world poisoned by volcanic gases, which has resulted in dwindling prey numbers.
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Featured creatures: Tyrannosaurus, Anatotitan, Torosaurus, Triceratops (the creature killed by the male Tyrannosaurus), Quetzalcoatlus, Dromaeosaurus, Ankylosaurus, Didelphodon, Dinilysia (the snake), Deinosuchus (the crocodile). The small bipeds attacked by the Dromaeosaurus are either Orodromeus, Parksosaurus or Thescelosaurus. The carcasses of a Tyrannosaur (possibly a juvenile specimen or a smaller species) and a prehistoric mammal can also be seen. This is the largest cast of the series. See more
The episode ends with time fast-forwarding from the Cretaceous period to a modern day landscape. When we start, we are in ancient North America, but as we arrive on modern Earth, we are suddenly on an African savanna. See more
There are still islands of greenery between the barren lava flows. In the warm moist climate of the late Cretaceous period, the vegetation has transformed.