"Luther" has given its audience at least three natural endpoints. The first and perhaps most satisfying closes the third season with Idris Elba's DCI John Luther, a hunter of psychopaths, tossing his signature overcoat into the Thames and strolling off with his unshakable frenemy Alice Morgan, a genius-level killer played by Ruth Wilson.
This was a suitable goodbye kiss until the two-part special that interrupts the character's leave of absence, returning him to the force. Five years after that we drop in on the intrepid vigilante detective for what should have truly been his last bow.
