Really looking forward to this one tonight. Charlie Brooker's dark drama 'Black Mirror' returns for a feature-length special starring Mad Men's Jon Hamm and will consist of three interwoven stories. We begin by meeting Matt and Potter who are sharing a Christmas meal, swapping creepy tales of their earlier lives in the outside world. Initially it seems like Matt is just the charismatic American trying to bring the reserved Potter out of his shell. But as we know from 'Black Mirror', nothing is quite as it seems. Also stars Game of Thrones' Oona Chaplin and Life of Pi's Rafe Spall.