Robert Hammond Patrick, Jr. is an American actor, perhaps best known for his portrayals of villainous characters. He is a Saturn Award winner with four nominations.\nPatrick dropped out of college when drama class sparked his interest in acting, and entered film in 1986. After playing a supporting role in Die Hard 2, Patrick starred as the T-1000, the main antagonist of Terminator 2: Judgment Day – a role he reprised for cameo appearances in Wayne's World and Last Action Hero. Other notable film credits include Fire in the Sky, Striptease, Cop Land, The Faculty, Spy Kids, Charlie's Angels: Full Throttle, Walk the Line, Flags of Our Fathers, We Are Marshall, Bridge to Terabithia, The Men Who Stare at Goats and Safe House.\nIn television, Patrick is known for his portrayals of FBI Special Agent John Doggett in The X-Files and Colonel Tom Ryan in The Unit, and has played ongoing roles in series such as The Outer Limits, The Sopranos, Elvis, Avatar: The Last Airbender, Burn Notice, Last Resort, Sons of Anarchy and From Dusk Till Dawn: The Series. He currently stars in the CBS drama series Scorpion as Agent Cabe Gallo.