Robert Hammond Patrick Jr. (born November 5, 1958) is an American actor. His career was launched internationally by his role as the antagonist T-1000 in James Cameron's film *Terminator 2: Judgment Day* (1991). For this performance, characterized by an impassive menace, he won a Saturn Award for Best Supporting Actor. In television, he is primarily known for playing Special Agent John Doggett in the final two seasons of the science fiction series *The X-Files* (2000-2002), a role that further consolidated his fame. His extensive filmography includes appearances in films such as *Die Hard 2* (1990), *Cop Land* (1997), *The Faculty* (1998), and *Walk the Line* (2005). Also consistently active on the small screen, he has had prominent roles in series such as *The Unit*, *Scorpion*, and *Peacemaker*, establishing himself as an iconic figure for portraying authoritarian, military, and often enigmatic characters.