MINISERIES PREMIERE: This six-part British miniseries import stars Joanna Froggatt, who engendered such love and sympathy as lady’s maid Anna Bates on PBS’s Downton Abbey. Here, she plays a schoolteacher who accepts a date with a handsome doctor, played by Ioan Gruffudd, then awakens convinced that she was raped. Liar begins as a he-said, she-said drama, but eventually shifts to something more mysterious.