Sunday Sign-Off: A Connecticut Yankee in the Dowager Countess’ Court

Maybe she’s not from Connecticut, but Shirley MacLaine’s Martha Levinson (USA! USA! USA!) will be bringing some good old American impropriety to the normally tight-lipped proceedings at Downton Abbey when the show’s new season finally premieres for American audiences tonight on PBS at 9 pm EST. Be there or be undeniably square for the rest of your natural life.