Dialogue in the final scene reveals that Marnie's mother had given up her virginity at 15 to Marnie's father in exchange for a sweater. Just before the film's release the studio had second thoughts about this part, and
Alfred Hitchcock agreed to cut the lines. But hundreds of prints had already been made, and rather than incur the cost of reprinting the final reel of each, the studio released them as they were, so there were two versions of the film from the outset.