Castle Sinister (1948)

Various people converge on remote, eerie Glennye Castle which is reputedly haunted by the ghost of a former lord. One of the guests is actually a Nazi spy and the real father of Lady Glennye's son. She threatens to expose him, but he is shot after the arrival of a British agent. Lady Glennye also dies and "The Glennye Phantom" - a hooded skeleton - puts in an appearance too.