Robert Stack (born Charles Langford Modini Stack, January 13, 1919 – May 14, 2003) was an American actor, sportsman, and television host. In addition to acting in more than 40 feature films, he starred in the 1959–63 ABC-TV hit television series The Untouchables, for which he won the 1960 Emmy Award for Best Actor in a Dramatic Series, and later hosted Unsolved Mysteries from 1987 until 2002.