The latest thing at 'Downton Abbey': Exit signs

"Downton Abbey" has found its groove, which, of course, involves no real groove at all. A groove would ruin it. Viewers have figured out that their beloved British period drama moves through its stories like a perfunctory telenovela aimed at the whitest people alive and that the show is mainly a good excuse to dial back a century and watch the working class serve the 1 percent a formal dinner night after night after night -- and pick up after them, and help them put on their clothes. (And to thi...