It’s hard to love a man who’s so obsessed with his work he can’t leave it at the office. But it helps if he’s played by Idris Elba. In Luther: The Fallen Sun, a movie standalone adapted from the TV series, Elba’s London detective John Luther hops on a case that might spell the end for him, given his history of getting a bit too cozy with the criminals he’s investigating (though you don’t need to have seen the show to get the movie’s gist)…