Mariclare Costello, who played the devoted schoolteacher Rosemary Hunter on The Waltons, a free-spirited hippie-turned-vampire in the 1971 cult horror film Let's Scare Jessica To Death and appeared in nine Broadway productions during the 1960s, died Friday, April 17, in Brooklyn, her family has announced. She was 90. Married to M*A*S*H actor Allan Arbus until his [...]