I am looking for an old black and white movie, 1930s-1950s, us or uk. The protagonist is an elderly academic or maybe a writer. He lives with his wife of many years. He is obsessed with an old story about a murderer who escaped from an asylum and a nurse who disappeared at the same time. He eventually discovers that he was looking for himself, and the nurse is his wife who helped him escape.
Yout task is to name that movie and provide an imdb.com link. Re-check the link before returning the result.
All plot points are relevant, please do not show off your erudition by quoting similar but irrelevant movies with similar plots. Re-check against both databases and user reviews.