Each episode features a forensic-styled breakdown of a prehistoric battle. Based on fossil evidence and paleontologist analysis, a CGI rendering of the battle, based on the evidence and the imagination of "Dinosaur George" Blasing (the show's "host") is the final act of each episode.
|1||Cannibal Dinosaur (Male Majungasaurus vs Female Majungasaurus)||Cannibalism is featured during the battle between a male Majungasaurus and a violent female Majungasaurus who tries to protect her offspring.||The male Majungasaurus, patrolling for a mate, sees the female Majungasaurus who isn't in the mood for mating. Seeing that the female has a baby, the male 'Majungasaurus' manages to eventually get past the angry female long enough to kill the female's offspring so that with no young for her to protect the female will be more open to mating, but the female Majungasaurus instead breaks the male's neck in an effort to save her young. But with the young having already been killed, she decides to reluctantly eat the baby, and then has the fallen male Majungasaurus as a main course (while he is still alive).||Female Majungasaurus|
|2||T. rex Hunter (Nanotyrannus vs Tyrannosaurus)||The history of a conflict made by a Tyrannosaurus rex family against a Nanotyrannus begins.||Sneaking into the territory of the Tyrannosaurus family when the adults are off on a hunt, Nanotyrannus terrorizes the adults' offspring and manages to kill one of the two unguarded juvenile T. rex in order to eliminate future competition (as T. rex will eventually grow to more than twice the size of Nanotyrannus). But before it can get to the second juvenile, the mother T. rex arrives back from her hunt. But instead of just turning and running, Nanotyrannus still tries to attack the second juvenile by darting around the much larger and angry mother to get to it. However, the mother is fast enough to catch the enemy in her jaws and throws it away for the other juvenile. The mother T. rex then picks up the Nanotyrannus in her jaws and crushes his body, then tears the corpse apart as a warning to any other predators around.||Tyrannosaurus|
|3||Gang Killers (Deinonychus vs Tenontosaurus)||A gruesome conflict between a pack of Deinonychus and a Tenontosaurus ensues.||The Deinonychus pack manages to separate a weak Tenontosaurus individual from a herd, and attack it, but the Tenontosaurus manages to get away after killing two Deinonychus. However, the herbivore is heavily wounded, and goes into a thicket of brush to hide. A thunderstorm brews and the Deinonychus attack the Tenontosaurus in the darkness of the storm. Although unable to see, the Tenontosaurus kills a few more Deinonychus, slamming one against a rock wall, before dying itself. Only three Deinonychus survive, and a brief face-biting pecking order ensues before the new, smaller pack begins to eat.||Deinonychus|
|4||Bloodiest Battle (Allosaurus vs Ceratosaurus vs Stegosaurus & Camarasaurus)||The bones of an Allosaurus pack, a Stegosaurus family, a Ceratosaurus and a Camarasaurus leads to the story of an all-out battle between these animals.||When a female Stegosaurus and her offspring get stuck in mud on a dried lake, a Ceratosaurus approaches, and starts to tear into the body of the younger one, eating it alive. The trapped mother Stegosaurus is helpless and unable to defend her offspring. The Ceratosaurus is also about to finish off the mother as well, but three nearby Allosaurus are attracted by the smell of blood. They also pick up the scent of their rival. With only one enemy to contend with, one of the Allosaurus break off from the rest of its group in order to flank it, while the other two move toward the Ceratosaurus to face it head-on to challenge it and make it move back and more out in the open for an ambush. This ploy proves to be a successful one, as the Ceratosaurus is indeed pushed back, and even though it still attempts to defend its kill from the two Allosaurus, baring its massive teeth at them in warning, the third Allosaurus comes out from hiding, charging into the unsuspecting enemy at full force. The stunned Ceratosaurus is knocked to the ground and the Allosaurus then quickly kills the downed Ceratosaurus'. The three Allosaurus then proceed to attack the Stegosaurus, but since one of the Allosaurus had inadvertently shifted the weight of the Stegosaurus mother in the mud by standing on top of it during their confrontation with the Ceratosaurus, it is now able to free her spiked tail from the mud and manages to kill one of the Allosaurus with a direct hit to its throat. Just then, three Camarasaurus appear and the alpha male of the group comes down to the water's edge and gets his front legs stuck in the mud. The two remaining Allosaurus then leave the Stegosaurus to attack the Camarasaurus. Two of the Camarasaurus retreat from the area, leaving the trapped alpha male behind. Though the Camarasaurus is badly wounded in the ensuing attack by the two Allosaurus, who use their large claws to slash at the sauropod's flanks as they pounce on it, the Camarasaurus uses his tail to kill one of the attacking Allosaurus, freeing his legs in the process. The final Allosaurus charges, but as the Camarasaurus is falling back to the ground, it lands on the Allosaurus head, killing it. The Camarasaurus (as well as the Stegosaurus) then eventually dies due to being stuck.||No clear winner (all died)|
|5||Deep Sea Killers (C. megalodon vs Brygmophyseter)||Scientists show the struggle of two apex predators: C. megalodon and Brygmophyseter fighting it out off the coast of Japan.||A Megalodon attacks a lone Brygmophyseter, riping off its fins and nearly biting off its tail. The wounded Biting Sperm Whale then sends out a distress call to its Pod. The other whales arrive to help their wounded companion and start to attack the Megalodon, knowing it can't take on all of the whales simultaneously, the shark goes deeper into the water. But the whales have a secret weapon; they narrow their sonar beams so that they actually stun the shark. The whales ram the stunned shark, injuring it in the process. However, the Megalodon is able to tolerate the punishment and as soon as the effect of sonar wears off, the shark slips away, while the crippled whale is already dead. The Brygmophyseters take a last peek at their dead companion and leave. As the path is cleared, the Megalodon comes back to enjoy its meal (the dead whale).||C. megalodon|
|6||Hunter Becomes Hunted (Allosaurus vs Ceratosaurus)||Paleontologists show the battle between an Allosaurus defending it's territory, and an intuding pair of Ceratosaurus fighting for it.||Harsh conditions force a mated pair of Ceratosaurus to venture into new territory to find suitable hunting grounds. The male Ceratosaurus chases its prey, leading it to the hidden female for an ambush. This territory however, belongs to an Allosaurus, who quietly stalks the intruding female. The Allosaurus strikes,ambushing the female Ceratosaurus, crushing her neck in it's jaws, killing her instantly. Unaware that she is dead, her mate continues with the hunt, but he finds the bellowing Allosaurus instead. The Allosaurus roars out in warning to the male Ceratosaurus to defend its territory. The smaller hunter stands its ground, so the enemy charges forward, snapping its jaws inches from the intruder's face. The Ceratosaurus runs into the trees and manages to dodge the rival's attacks, and after using the claws on its forelimbs to slash the face of the surprised Allosaurus, jumps onto its enemy's back and sinks its massive teeth into the back of his rival's neck. But the Allosaurus manages to shake the Ceratosaurus off, and bites deep into it's shoulder. The Ceratosaurus struggles, but is unable to free itself from the jaws of the Allosaurus. The Allosaurus then tosses the Ceratosaurus into a tree. Once the mortally wounded Ceratosaurus is on the ground, the Allosaurus uses the claws on its feet to cut its body open. Towering over its fallen rival, the triumphant Allosaurus roars in victory as it regains its territory.||Allosaurus|
|7||Largest Killers (The theropods Allosaurus, Utahraptor, Majungasaurus, Albertosaurus, and Tyrannosaurus are compared to see which was the deadliest killer)||Scientists explain some of the largest known theropod dinosaurs.||None since the episode centered around the predators' strengths. It is implied, however, that the largest killer was mother nature itself, for each of the predators featured went extinct when the climate changed.||No victor since the episode centered around the predators' strengths|
|8||Raptor's Last Stand (Utahraptor vs Gastonia)||Scientists show the battle between a Utahraptor and a Gastonia during a drought.||A Gastonia searches for water and is ambushed by Utahraptor. The Utahraptor slashes and bites the Gastonia but is hit several times. Eventually Utahraptor charges at the Gastonia, but Gastonia swings its tail and hits the Utahraptor with its spikes. The episode says neither died from that battle but from the drought.||Gastonia|
|9||Ice Aged Monsters (Arctodus vs American Lion)||The Arctodus and American Lion face-off in the ice age of North America.||An Arctodus and American Lion fight over a kill made by the lion. The fight is not only for food, but to eliminate competition for already scarce resources, due to warming climate conditions. Both manage to inflict severe wounds on one another during the course of the fight. The fight ends when the Arctodus throws the American Lion into the Natural Trap Cave (in Wyoming), where it dies from the fall.||Arctodus|
|10||River Of Death (Albertosaurus vs Pachyrhinosaurus)||A pack of Albertosaurus attack a herd of Pachyrhinosaurus eventually drawing them into the river causing the pachyrhinosaurs to drown.||Albertosaurus|
|11||Raptor vs T. rex (Tyrannosaurus vs Dromaeosaurus vs Edmontosaurus)|
|12||Armageddon (investigates the extinction of the dinosaurs)||None since the episode centered around the extinction of the dinosaurs||No victor since the episode centered around the extinction of the dinosaurs|
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