时长:00:31:30 / 首播:2017-02-28
Nina (Alexandra Roach) thinks Professor Squires (Pemberton) has all the answers when, actually, neither has a clue what the future holds. They commence a battle of wits to solve a crossword puzzle and reveal the guardian of their fate. Dr Jacob Tyler (Shearsmith) joins the unravelling of the cryptic clues... but will they solve the riddle of the Sphinx?