Gastrollen:
Emily Carey(Mary Conan Doyle), Noah Jupe(Kingsley Conan Doyle), Simone Kirby(Sister Grace), Adam Nagaitis(Sergeant George Gudgett), Diana Quick(Cecilia Weiss), Tim McInnerny(Chief Inspector Horace Merring), Louise Delamere(Touie Doyle), Jerry-Jane Pears(Florrie), Adelayo Adedayo(Winnie), Penny Downie(Mrs. Sulzbach), Amanda Lawrence(Sister Mathilda), Eileen O'Brien(Sister Fabian), Allison Saxton(Nun), Gavin Williams(Patron #3), Harry Haynes(Officer Scott (uncredited)), Richard Price(Houdini Stage Hand (uncredited)), Patrick Carney Junior(Upper Class Gent), Lady Conny Sharples(Amanda Posh (as Conny Sharp)), Will Chambers(Patient), Kezia Davis(Convent Girl), Philip Gascoyne(Scotland Yard Detective), Kate Hawley(Nun), Georgie-May Tearle(Curious Onlooker), Kieran Thomas(Julian Kelly), Flora Turner(Lucy Allthorpe), Melissa Lianne Woods(Upper Class Lady (as Melissa Woods)), Alex Jaep(Stage Assistant (uncredited)), Neil Swift(Upper Class Gentlemen (uncredited)), Patricia Winker(Medium (uncredited))