Crescendo
In this horror film, an American graduate student travels to southern France to research her thesis. She is writing about a famed composer who recently died. She stays with his widow and his son, a disabled drug-addict. She becomes more involved in the family than she wanted after she finds the composer's crazy twin, hidden away in the attic. She almost dies trying to escape.
Director: Alan Gibson
Starring: Stefanie Powers, James Olson, Margaretta Scott, Jane Lapotaire, Joss Ackland