When the Coelophysis mob the Postosuchus, in one shot a dead Coelophysis can be seen next to the Postosuchus. It disappears in subsequent shots.
When the Coelophysis mob the Postosuchus, the Postosuchus' jaws switch from being open to closed between shots.
When the Peteinosaurus bathes, in the closeup shots of its head, it's missing its wings.
The father Cynodont rushes out of the burrow with its mouth open, but in the next shot, it's closed.
Real life Postosuchus most likely did not excrete urine as shown in the program. Rather than releasing a stream of fluid, they got rid of unwanted minerals during defecation.
When the Peteinosaurus is washing itself, it doesn't blink despite getting water in its eyes.
The location of the splashes in the water in the final scene doesn't entirely match where the Plateosaurus' feet are.
When a Coelophysis walks past some bushes in an early-morning scene, parts of the bushes seem to pass through its tail.
As the Placerias are bathing in the river, the one standing on the bank doesn't have a reflection in the water.
The water reflection of the fishing Coelophysis is not correctly aligned when it eats the fish.
When the Postosuchus drinks from the river, the splashes it makes are going into the opposite direction than the water's flow.
During the introduction, where we're treated to previews from upcoming episodes, the giant pterosaur Ornithocheirus from the Cretaceous is incorrectly placed in the Jurassic era.
The Peteinosaurus makes sounds without opening its mouth in some shots.
The squeaks of the Cynodont pup can still be heard after the Coelophysis has eaten it.
When the Peteinosaurus is taking a bath in the remains of a river you can see a shadow of a crew member on the tree trunk behind him.
In the closeup shot of the Placerias drooling in the desert, the edge of the puppet's neck can be seen in the lower right corner for a moment, and as it lowers its head, the lips and nose of the crew member controlling the puppet can also clearly be seen before the shot cuts.