Robert Patrick shot to fame by starring opposite Arnold Schwarzenegger in 1991's Terminator 2: Judgment Day, where he played the role of a T-1000, a seemingly unstoppable Terminator that assumed human form. Patrick also became well-known on the small screen in his role as Agent John Doggett from 2000 to 2002 in the final two seasons of The X-Files. While most fans were apprehensive about the last two years of the show, most were satisfied with Patrick's performance.More recently, in 2005's Walk the Line, and in the TV Mini-series "Elvis", Robert Patrick played the role of the father of Johnny Cash and of Elvis Presley, respectively. He currently has a regular role on The Unit, and is scheduled to finish filming "Lonely Street", a comedy caper where his role is that of a certain Mr. Aaron, a mysterious celebrity thought to have faked his own death and who is none other than Elvis Presley.
Patrick portrays Colonel Tom Ryan in the CBS series "The Unit."