“On a cold, fretful afternoon in early October, 1872, a hansom cab drew up outside the offices of Lockhart and Selby and a young girl got out and paid the driver. Her name was Sally Lockhart; and within fifteen minutes, she was going to kill a man.” The BBC's adaptation of Philip Pullman's first book in the series, Ruby in the Smoke, is set to air this Christmas and an advance screening is to take place at the National Film Theatre. Pullman will take part in a Q&A following the preview. You can book tickets online at the NFT's website.