Revealing mistakes: The animation error in which the teeth of the Diplodocus "stretch" as they open their jaws got carried over to this spin-off from the original "Walking with Dinosaurs" (1999) series.
Revealing mistakes: When Al is hit by the neck of the sick Diplodocus, the tip of his tale passes through the neck.
Continuity: Big Al's foot injury switches from being on his right foot to his left in the closeup of his foot, near the end of the episode.
Revealing mistakes: As Al swallows the lizard, its tail passes through his tongue.
Revealing mistakes: When the female Allosaurus tackles Al to the ground and jumps over him, for a moment as a cloud of dust bursts up, she becomes transparent.
Revealing mistakes: Near the end of the big Diplodocus hunt-scene, as the giant animal rears up on its hind legs, take a look at the second Allosaurus to run into view: it is actually transparent.
Revealing mistakes: Near the beginning, when the mother Allosaurus and her chicks gather around a pool of water, you can see the reflections of trees through theirs, as if they were transparent.
Revealing mistakes: When Big Al is considering attacking a mother Ornitholestes, his right arm juts out of place slightly as he scratches his head.