Guest Stars Jane Mahady as Katya Velcra Nicholas Hoult as Pugachev Tristan Beint as Soldier Alexi Ali Ariaie as Raskolvy Timothy Walker as Soldier Emile Eloise Webb as Sylvana Anthony Welsh as Father Basil Ashwin Bolar as Doctor Smirnov Sam Coulson as Pugachev / Peter Double Kiki May as Nadia Aiyana Goodfellow as Tula Gethin Alderman as Jean Pierre Danielle Galligan as Yula Grace Chilton as Servant Khristina Tallulah Bond as Zasha Ninette Finch as Shakey Paul Hunter as Antonov