Villa Diodati, 1816 - on a night that inspired Mary Shelley's Frankenstein. The plan was to spend the evening in the presence of literary greats - but the ghosts are all too real. And the Doctor is forced into an earth-shattering decision when Cyberman arrives to change the history.
Dir. Emma Sullivan
Cast: Jodie Whittaker, Bradley Walsh, Tosin Cole, Mandip Gill, Maxim Baldry, Nadia Parkes, Jacob Collins -Levy, Lilli Miller
season 12 ep 8, full episode available on BBC iplayer