Bruce William Boxleitner (born May 12, 1950) is an American actor, and science fiction and suspense writer. He is known for his leading roles in the television series How the West Was Won, Bring 'Em Back Alive, Scarecrow and Mrs. King (with Kate Jackson), and Babylon 5 (as John Sheridan in seasons 2–5, 1994–1998). He is also known for his role as the titular character of the innovative Walt Disney Pictures film Tron, a role which he will reprise in the anticipated 2010 sequel, Tron: Legacy.