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 ABC-TV television series The Untouchables (1959–63), for which he won the 1960 Emmy Award for Best Actor in a Dramatic Series, and later hosted Unsolved Mysteries (1987–2002). He was also nominated for an Academy Award for Best Supporting Actor for his role in the film Written on the Wind (1956).