Castle played Michael Myers in the 1978 horror film Halloween, directed by former USC classmate John Carpenter, being paid $25 a day. Castle's subsequent collaborations with Carpenter included his name being used as one of the main characters' names in The Fog, co-writing the script of Escape From New York, and performing the title song of Big Trouble in Little China as part of the band The Coup De Villes, alongside Carpenter and another friend, Tommy Lee Wallace.