Don't Bother to Knock

Bill Ferguson (Richard Todd), a Scottish romantically active travel agent has an argument with his soon to be fiancée Stella when he loses the key to his Edinburgh apartment. Maggie, an American business associate of Bill's, find's Bill's key in his trouser cuff where he dropped it. Prior to returning it she makes a copy of Bill's key then gives him a gift of a case of copies of the key with Bill's address on a metal tag.