face as he narrowly dodges the killer blow. Later, a herd of Pachyrhinosaurus arrives and starts to compete for the dwindling food supply, further pressuring the herd's search for food. Scar finds the Edmontonia, his old friend, feasting on rotten wood and insect larvae from a fallen tree branch and tries his luck with mixed success. The sun sets and the Pachyrhinosaurus herd moves on somewhere else in search of food. The winter's approach causes the herbivores to start risking their safety and a young female Edmontosaurus gets killed by the Gorgosaurus as she wanders too far from the herd. The next day, the Edmontosaurus and Pachyrhinosaurus herds move south for the winter towards Alberta, while Edmontonia stays behind. She's way too heavy and her armoured body has been storing fat to last her through the long lean months of cold. Meanwhile, Patch and the Troodons are feasting on the dead female Edmontosaurus when the Gorgosaurus appears. The tyrannosaur scares the troodontids away, but is wounded in the fight, and Patch is frustrated and must work harder to find prey. Far away, the dinosaur herd is moving on, until Scar sees a dark shadows, which turns out to be a flock of scavenging Quetzalcoatlus, which feed on the dying herd members that could not keep pace. A blizzard arrives and Scar collapses, but an older male arrives and helps him to keep moving through the blizzard. They continue on walking and don't realize they are heading into a trap; the ground breaks apart, as they walked onto a frozen sea inlet. As the herd struggles to escape the icy water, several get dragged under by mosasaurs known as Prognathodon. Scar has never swum before, but he is pushed in and starts to swim for the shore. Back in Alaska, Patch picks up a bone and heads back to his nest, which he has been building in the hopes of attracting a mate. Nearby, The Gorgosaurus finds the Edmontonia outside its lair, but the bite to its leg is badly infected and it goes back into the cave to wait for easier prey to wander close. Six hundred miles away, the Edmontosaurus herd moves on through a volcanic ash field. Lying in wait, a pack of Albertosaurus sleeps until the herd is close enough to ambush. The feathered carnivores wake up and start to stalk the herd. Scar runs for his