Guest Stars Emily Carey as Mary Conan Doyle Diana Quick as Cecelia Weiss Emily Hampshire as Madam Korzha Jeremy Swift as Dr Henry Whitaker Lily-Rose Aslandogdu as Julia Hargreaves Tom Canton as Paul Hargreaves Lex Shrapnel as Mitchell Pearce Tracy Spencer as Lara Emilia Forster as Helena Wood Thomasin Rand as Betina Hargreaves Darren Kent as Fip Edward Akrout as Henri Harry Haynes as Officer #1
