The Power of the Dog, written and directed by Jane Campion, is assumed by many to be Benedict Cumberbatch’s film as he portrays a bullying, hypermasculine cowboy in 1925 Montana. Cumberbatch is terrific, I’ll admit that. But I think it’s Kodi Smit-McPhee’s film as Peter, the ‘Nancy Boy’ in the story. Hear me out.