Bruce Boxleitner

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". 
He is also known for his dual role as the characters Alan Bradley and Tron in the 1982 Walt Disney Pictures movie "Tron", a role which he reprised in the 2010 sequel, ' and the animated series '.