Back to the Future actress Elsa Raven has died at the age of 91, her agent has confirmed.The character actress is best known for her role as the “Save The Clock Tower” lady in Robert Zemeckis’ 1985 sci-fi classic.Read more: 24 facts about Back to the Future that might surprise youRaven also starred in The Amityville Horror, In The Line of Fire, Fearless, and Moderns, in which she played Gertrude Stein.