He has also appeared in several films, including playing 'the psychotic Psychs', the owner of the doll, in Seed of Chucky (2004), and Clarence Weasel in The Wind in the Willows (1996), based on the popular book.

He also had a small part in Velvet Goldmine (1998) and in EastEnders (1999) as Dean Collins.

[1] In 2000, Castle starred in a horror, documentary-style show called Urban Gothic, in which he played Rex, a vampire who lives and hunts on the night streets of Soho.

[2] Castle's other roles include Patrick in the film Doghouse in 2009; the character of Patrick was formerly a high powered businessman but now more interested in playing golf and meditating, despite his wives dislike to the idea.

In 2015, Castle also starred in a short film called The Stranger Kind alongside Eleanor Tomlinson, where he played Number Six; a dark, disguised magician.