American actor well known for his portrayal of big screen villains. His most memorable roles include Mike Rogers from Fire in the Sky, the T-1000 in Terminator 2: Judgment Day, and Todd Nixon in The Men Who Stare at Goats. In 2017, he appeared in the thriller Eloise.
He had a small role in Die Hard 2.
He married actress Barbara Patrick, with whom he had two children. His brother Richard Patrick is a musician.
He played the antagonist in Terminator 2: Judgement Day, which starred Linda Hamilton.