Guest Stars Alistair Green as Count Smolny Jane Mahady as Katya Velcra Nicholas Hoult as Pugachev Henry Meredith as Maxim Emily Coates as Petra Richard Pyros as Count Raskolnikov Jacob Fortune-Lloyd as Grigory Petrov Ashwin Bolar as Doctor Smirnov Gethin Alderman as Jean Pierre Tarik Badwan as Boris