Sean Miller is the main antagonist in the 1987 novel Patriot Games and the 1992 film of the same name. He is Jack Ryan's arch-nemesis and a highly skilled Irish terrorist with a grudge against Jack Ryan who is responsible for his brother's death. He was portrayed by Sean Bean, who also played Alec Trevelyan in GoldenEye, Patrick Koster in Don't Say a Word, John Ryder in the remake of The Hitcher, Ian Howe in National Treasure, Dr. Bernard Merrick in The Island, and Joseph Wilford in TNT's Snowpiercer.