Stephen Mangan Sir Arthur Conan Doyle Actor Michael Weston Harry Houdini Actor Rebecca Liddiard Constable Adelaide Stratton Actor Adam Nagaitis George Gudgett Guest Star Tim McInnerny Horace Merring Guest Star Andy Gillies Pumley Guest Star Anna Koval Liliana Guest Star Kevin Mains Lachlan MacBride Guest Star Anthony Maloney Undertaker Guest Star Diana Quick Cecilia Weiss Guest Star Paul Ritter Bram Stoker Guest Star Owen Teale Professor Havensling Guest Star David Shore Executive Producer Kenton Allen Executive Producer Matthew Justice Executive Producer Luke Alkin Executive Producer Christina Jennings Executive Producer Maggie Murphy Executive Producer Scott Garvie Executive Producer