FEATURE BY MARK WRIGHT
BBC One, 9 December 2018
Writer: Chris Chibnall
Director: Jamie Childs
Guest cast: Phyllis Logan (Andinio), Mark Addy (Paltraki), Percelle Ascott (Delph), Samuel Oatley (Tzim-Sha), Jan Le (Umsang)
Rating: 5.30m (overnight figure only)
Appreciation Index: 79