Career
He has guest-starred in numerous television shows, mostly British. He has also appeared in several films, including playing "the psychotic ", the owner of the doll, in Seed of Chucky (2004), and in The Wind in the Willows (1996), based on the popular book To portray the rather loony weasel he wore small furry ears, a long tail and a long, yellow swishing coat.
He also had a small part in Velvet Goldmine (1998).
To younger viewers, he is probably best known for his role in the CBBC series Young Dracula as the infamous Count Dracula. Castle"s more recent role was as in the film Doghouse.
The character of was formerly a high powered businessman but more interested in playing golf and meditating.