• Cast in Order of Appearance: Stephen Mangan (Arthur Conan Doyle), Michael Weston (Harry Houdini), Adelayo Adedayo (Sister Winnie), Eileen O'Brien (Sister Fabian), Amanda Lawrence (Sister Mathilda), Adam Nagaitis (George Gudgett), Jerry-Jane Pears (Florrie), Tim McInnerny (Horace Merring), Rebecca Liddiard (Adelaide Stratton), Simone Kirby (Sister Grace), Flora Turner (Lucy Allthorpe), Penny Downie (Mrs. Sulzbach), Diana Quick (Cecilia Weiss), Louise Delamere (Touie Conan Doyle), Noah Jupe (Kingsley Conan Doyle), Emily Carey (Mary Conan Doyle)
• Story By: David Hoselton & David Titcher
• Teleplay By: David Hoselton
• Directed By: Stephen Hopkins

• Cast in Order of Appearance: Samuel Joslin (Boy), Laura Fraser (Lydia Belworth), Stephen Mangan (Arthur Conan Doyle), Emily Carey (Mary Conan Doyle), Angela Curran (Vera Tufts), Noah Jupe (Kingsley Conan Doyle), Tim McInnerny (Horace Merring), Adam Nagaitis (George Gudgett), Michael Weston (Harry Houdini), Rebecca Liddiard (Adelaide Stratton), Phil Nice (Reverend Gilby), Andrea Lowe (Beatrice Upton), Ruth Lass (Clara Bennett), Matt Lanigan (Frank Bennett), Sian Breckin (Margery Mcguire)
• Written By: David Hoselton
• Directed By: Stephen Hopkins

• Cast in Order of Appearance: Nathan Stewart-Jarrett (Elias Downey), Marshall Griffin (Security Guard Joseph), Nicholas Burns (Frederick Batch), Amy Huberman (Anne Batch), Enuka Okuma (Jane Downey), Stephen Mangan (Arthur Conan Doyle), Louise Delamere (Touie Conan Doyle), Emily Carey (Mary Conan Doyle), Tim McInnerny (Horace Merring), Michael Weston (Harry Houdini), Rebecca Liddiard (Adelaide Stratton), Adam Nagaitis (George Gudgett), Mark Arden (Sick Man), Claire Rafferty (Charlotte), Andrew Bridgmont (Dr. Perlow), Esh Alladi (Dr. Kasad), Jerry-Jane Pears (Florrie), Noah Jupe (Kingsley Conan Doyle), Diana Quick (Cecilia Weiss)
• Written By: Melissa Byer & Treena Hancock
• Directed By: Daniel O'Hara

• Cast in Order of Appearance: Sebastian Croft (Newsie), James Lance (Barrett Underhill), Helen Millar (Isobel Underhill), Scott Jenkinson (Spring Heel'd Jack), Stephen Mangan (Arthur Conan Doyle), Noah Jupe (Kingsley Conan Doyle), Emily Carey (Mary Conan Doyle), Michael Weston (Harry Houdini), Rebecca Liddiard (Adelaide Stratton), Paddy C. Courtney (Gaines), Tim McInnerny (Horace Merring), Adam Nagaitis (George Gudgett), Craig Conway (Angus Tuttle), Blake Harrison (Lyman Biggs), Tommy McDonnell (Nigel Pennington), Tereza Srbova (Natalia Kroshenko), Mary Healey (Mrs. Blake), Natasha Sparkes (Sophie), Dean Forster (Herbert Ogilvie), Dritan Kastrati (Vladimir Palinov)
• Written By: Carl Binder
• Directed By: Daniel O'Hara

• Cast in Order of Appearance: Emily Hampshire (Madame Koezha), Edward Akrout (Henri), Adam Nagaitis (George Gudgett), Harry Haynes (Officer #1), Thomasin Rand (Betina Hargreaves), Tom Canton (Paul Hargreaves), Lily-Rose Aslandogdu (Julia Hargreaves), Michael Weston (Harry Houdini), Diana Quick (Cecilia Weiss), Stephen Mangan (Arthur Conan Doyle), Emily Carey (Mary Conan Doyle), Rebecca Liddiard (Adelaide Stratton), Tim McInnerny (Horace Merring), Lex Shrapnel (Mitchell Pearce), Jeremy Swift (Dr. Henry Whitaker), Tracy Spencer (Lara), Darren Kent (Fip), Emilia Forster (Helena Wood)
• Written By: Joshua Brandon
• Directed By: Ed Bazalgette

• Cast in Order of Appearance: Gillian Saker (Rosie Berry), Reece Noi (Daniel Berry), Martin Walsh (Farmer), Stephen Mangan (Arthur Conan Doyle), Michael Weston (Harry Houdini), Rebecca Liddiard (Adelaide Stratton), Joel Morris (Jim Gorton), Thomas Howes (Constable Booth), Neil Bell (Ned), Janine Duvitski (Martha Stiles), Paul Warren (First Alien), Josef Altin (Milov), Tiago Fonseca (Second Alien)
• Written By: Nazrin Choudhury
• Directed By: Ed Bazalgette

• Cast in Order of Appearance: Charlotte Hope (Molly Morgan), Kevin Trainor (Priest), Stephen Mangan (Arthur Conan Doyle), Lewis McGowan (Young Doyle), Michael Weston (Harry Houdini), Rebecca Liddiard (Adelaide Stratton), James Fleet (Dr. Pilsen), Ewen Bremner (Sherlock Holmes), Noah Jupe (Kingsley Conan Doyle), Risteard Cooper (Charles Doyle), Michael Shelford (Simon Fleming), Andrew Bicknell (Excorist), Joe Sims (Nathaniel), Chu Omambala (Dr. Randall), Stacey J. Gough (Guard), Angela Curran (Vera Tufts), Chook Sibtain (Dr. Chandra), Emily Carey (Mary Conan Doyle), Louise Delamere (Touie Conan Doyle)
• Written By: David Titcher
• Directed By: Rob Lieberman

• Cast in Order of Appearance: Paul Ritter (Bram Stoker), Kevin Mains (Lachlan McBride), Stephen Mangan (Arthur Conan Doyle), Michael Weston (Harry Houdini), Rebecca Liddiard (Adelaide Stratton), Diana Quick (Cecilia Weiss), Owen Teale (Esmer Havensglin), Anna Koval (Liliana), Matt Cross (Janos), Andy Gillies (Purnley), Adam Nagaitis (George Gudgett), Tim McInnerny (Horace Merring)
• Written By: Carl Binder
• Directed By: Rob Lieberman

• Cast in Order of Appearance: Lara Jean Chorostecki (Mrs. Clara Reid), Simon Northwood (Mr. Emmett Reid), Billy MacLellan (Constable McKellar), Stephen Mangan (Arthur Conan Doyle), Rebecca Liddiard (Adelaide Stratton), Michael Weston (Harry Houdini), Elias Toufexis (Roland Carson), Natalie Krill (Millie Pasternak), Peter Outerbridge (Thomas Edison), Ali Momen (Rustom Avari), Tim Mooney (Mr. Turner), Arielle Cohen (Mr. Turner's Daughter), Daniel Matmor (Rabbi), Justin Rutledge (Theodore Weiss), Bo Martyn (Young Woman), Diana Quick (Cecilia Weiss), Jacob Blair (Benjamin Graves)
• Written By: Melissa R. Byer & Treena Hancock
• Directed By: Jeff Renfroe

• Cast in Order of Appearance: Kjartan Hewitt (Reverend Jesper Farley), Stephen Mangan (Arthur Conan Doyle), Michael Weston (Harry Houdini), Rebecca Liddiard (Adelaide Stratton), Jacob Blair (Benjamin Graves), Caleb Cosman (Corporal Bazay), Brandon Oakes ("Walt" Wattabakinai), Sarah Abbott (Libby Cotter), Bo Martyn (Young Woman), Diana Quick (Cecilia Weiss), Nicolas Van Burek (Stuart Branowski), Paul Johnston (Shabby Man), Gary Augustynek (President William McKinley), Mark Caven (Sherlock Holmes), Jory Rossiter (Porter)
• Written By: David Hoselton
• Directed By: Jeff Renfroe