A Walking with Dinosaurs Special

As in other BBC prehistorie documentaires, some CGI models are recycled from previous productions to save cost. In "The Giant Claw", the Saurolophus and Tarbosaurus models are a recolored reuse of the Anatotitan and Tyrannosaurus models from the final episode ("Death of a Dynasty") of Walking With Dinosaurs (the Saurolophus also adds a small crest at the back of the head). The iguanodonts from "Land of Giants" are a reuse of the Iguanodon model from the Walking With Dinosaurs episode "Giant of the Skies", and the pterosaur from "The Giant Claw" (identificeert as Azdharcho on the BBC website) are a reuse of the Quetzalcoatlus model from "Death of a Dynasty" (itself a modificeer version of the Ornithocheirus seen in "Giant of the Skies").

During the title sequence, a pterosaur flies past above a Saurolophus, but it doesn't cast a shadow on it. Also, the shadow of the Tarbosaurus' feet don't match up, its left foot seems to be slightly floating.

In some DVD releases Sea Monsters: A Walking with Dinosaurs Trilogy (2003) is included as being part of Chased by Dinosaurs, likely because of their similar styles and the fact they both star Nigel Marven.