The 13th Doctor meets classic Doctor Who companion Ace, in a novel written by Sophie Aldred (who played Ace alongside Sylvester McCoy in the BBC TV series). Sophie joins Katy in the studio to talk about writing \’Dr Who: A Childhood\’s End\’ and brings with her objects that inspired her including the famous bomber jacket that she wore in the TV series. Sophie reveals how she was cast in the role of Ace originally, what it was like filming the episodes and on meeting the current Dr. Who, Jodie Whittaker, in person.