Chedra: a female law officer who has been stranded on Earth. Companion of the Extreme Dinosaurs. Resembles a human but for her blue skin & hair and pointy ears. Chedra is obssessed with law and always carries a Codebook wherein the many rules of her race are inscribed. Although her book is (as T-Bone observes) sixty-five million years out of date, Chedra persists in quoting from it and in scolding her friends when they violate its edicts.

Porcupine Nevell: Paleontologist and owner of a private Dinosaur Museum. Being very used to oddities, he has no objection to allowing the ravenous Extreme Dinosaurs to stay in his establishment for as long as they choose. He lends them a "crock-pot" to use as an incubator for the then-unhatched egg that would later become Stegz's pet ostrich, Ditto; shares his knowledge of machinery; and presumably keeps their existence a secret.

Prince H: A young Brittish prince about Sara's age, he is very smart & sophisticated, and helps the guys in anyway he can. He & Sara became friends after they met, they're even pen-pals. He loves Cordelia as much as anyone, he himself has a beloved & beautiful dragon like her, a male red one named Dante.