Not really a “costume movie” per se but as it’s period, here it is. Joely Richardson and Jodhi May star as two French chambermaid sisters who murdered their employers in 1930s France. The crime was hugely shocking at the time. Set in the 1930s, with decent but not exciting costumes. Warning: not only is it gory (not in a horror movie sort of way), but there are also incestual/lesbian elements. Sorry if that’s a spoiler, but if that sort of thing really bothers you, skip it altogether. This version is relatively shallow and not terribly illuminating. See the French-language film instead.