Guest Stars Alistair Green as Count Smolny Jane Mahady as Katya Velcra Nicholas Hoult as Pugachev Julian Barratt as Doctor Vinodel Tristan Beint as Soldier Alexi Ali Ariaie as Raskolvy Dustin Demri-Burns as Voltaire Timothy Walker as Soldier Emile Eloise Webb as Sylvana Anthony Welsh as Father Basil Kiki May as Nadia Sam Coulson as Pugachev / Peter Double Aiyana Goodfellow as Tula Danielle Galligan as Yula Tallulah Bond as Zasha Ninette Finch as Shakey Waleed Akhtar as Oleg Kaminsky