Once an imported British limited series, Luther, starring Idris Elba, returns as a one-night telemovie special. Elba’s London DCI John Luther is as intense as ever – maybe more so, now that his nemesis and love, Alice Morgan (played by the equally brilliant Ruth Wilson, now of Showtime’s The Affair), no longer is around. But he can smile… on occasion. For a full review, see David Hinckley's All Along the Watchtower.