From Wikipedia the free encyclopedia Robert Arthur born Robert Paul Arthaud June 18 1925 October 1 2008 was an American motion picture actor who appeared in dozens of films in the 1940s and 1950s He appeared in the 1949 war film Twelve OClock High as the comic reliefproviding Sgt McIllhenny in the 1951 Billy Wilder film Ace in the Hole and in the 1950s television program The Lone Ranger Arthur was known for playing youthful teenage or young adult roles In his later years Arthur became an activist for gay rights on behalf of senior citizens He died in Aberdeen Washington in 2008 aged 83