'Luther': Where John and Alice Left Off

Luther returns tonight to BBC America for a special that begins with Idris Elba’s titular detective taking time away from the badge and his predictable wardrobe. Before long — thanks to news brought by new faces DCI Theo Bloom (Darren Boyd) and DS Emma Lane (Game of Thrones’ Rose Leslie) and unforeseen events — he’s back in London searching for the truth about a mystery we won’t spoil and hunting a cannibalistic serial killer.

The Luther special premieres Dec. 17 at 9 p.m. on BBC America.