Episode: 1 The Trouble With Trilobites Episode: 2 When Did the First Flower Bloom? Episode: 3 The Tully Monster & Other Problematic Creatures Episode: 4 Stegosaurs: Tiny Brains & Thagomizers Episode: 5 What Colors Were Dinosaurs? Episode: 6 The Story of Saberteeth Episode: 7 That Time Oxygen Almost Killed Everything Episode: 8 The Biggest Thing That Ever Flew Episode: 9 Dimetrodon: Our Most Unlikely Ancestor Episode: 10 The Extinction That Never Happened Episode: 11 The Strange Case of the Buzzsaw Jaws Episode: 12 The Age of Giant Insects Episode: 13 History's Most Powerful Plants Episode: 14 How Did Dinosaurs Get So Huge? Episode: 15 When The Earth Was Purple Episode: 16 'Living Fossils' Aren't Really a Thing Episode: 17 When Whales Walked Episode: 18 An Illustrated History of Dinosaurs Episode: 19 A Brief History of Geologic Time Episode: 20 The Search for the Earliest Life Episode: 21 The Facts About Dinosaurs & Feathers Episode: 22 The Last Time the Globe Warmed Episode: 23 What Happened to the World's Greatest Ape? Episode: 24 When Giant Fungi Ruled