Frederick Reginald Ironside, known professionally as Michael Ironside, is a Canadian actor, voice artist, and filmmaker. A prominent character actor with over 270 film and television credits, he is known for playing villains and antiheroes, but has also portrayed sympathetic characters. He is best known for his roles in action and science fiction films, and had his breakthrough performance in the 1981 David Cronenberg film Scanners.

Scanners is a 1981 Canadian science fiction horror film written and directed by David Cronenberg and starring Stephen Lack, Jennifer O'Neill, Michael Ironside, and Patrick McGoohan. In the film, "scanners" are psychics with unusual telepathic and telekinetic powers. ConSec, a purveyor of weaponry and security systems, searches out scanners to use them for its own purposes. The film's plot concerns the attempt by Darryl Revok (Ironside), a renegade scanner, to wage a war against ConSec. Another scanner, Cameron Vale (Lack), is dispatched by ConSec to stop Revok.