From ancient Syria to present day Sheffield, and out into the wilds of space, something is stalking the Doctor and infecting people’s nightmares.

As Graham, Yaz and Ryan return home to see friends and family, they find themselves haunted by very different experiences. Who is the figure calling from beyond the stars for help, and why? And what are the fearsome Chagaskas terrorising Aleppo in 1380?

To find the answers, Team TARDIS must embark on a mission which forces them to face their darkest fears.


  • Jodie Whittaker as The Doctor
  • Mandip Gill as Yaz
  • Tosin Cole as Ryan
  • Bradley Walsh as Graham
  • Clare-Hope Ashitey as Rakaya
  • Buom Tihngang as Tibo
  • Ian Gelder as Zellin
  • Sirine Saba as Maryam
  • Aruhan Galieva as Tahira
  • Nasreen Hussain as Anita Patel
  • Bhavnisha Parmar as Sonya Khan
  • Everal A Walsh as Gabriel
  • Michael Keane as Fred
  • Anthony Taylor as Andrew
  • Willie Jonah as Old Tibo


  • Writer – Charlene James and Chris Chibnall
  • Director – Emma Sullivan
  • Executive Producer – Chris Chibnall

Doctor Who continues Sunday 9th February at 7:10pm on BBC One