'The Seventh Veil', starring Ann Todd, James Mason and Herbert Lom.
Ann Todd is a classical pianist who is in a nursing home following a nervous breakdown; James Mason her overbearing guardian, Herbert Lom the psychologist trying to help her recover. Apparently, this is the tenth most popular film of all time in terms of tickets sold, beating Lord of the Rings and Harry Potter. A bit creaky, but good performances from the lead actors.