Children nationwide are eager to get their hands on Silver Shamrock masks this Halloween. Doctor Daniel Challis is on a mission to expose a sinister scheme orchestrated by Conal Cochran, the owner of Silver Shamrock. This 1982 film is directed by Tommy Lee Wallace, with a screenplay by Wallace, John Carpenter, and Nigel Kneale, starring Tom Atkins, Stacey Nelkin, and Dan O'Herlihy.