Guest Stars Bruce MacKinnon as Sir Arthur Conan Doyle Charlotte Ritchie as Herself Anthony Stewart Head as Alexander Graham Bell Mathew Baynton as Antonio Meucci Catherine Tate as Elsie Wright Tim Key as Thomas Edison Mathew Horne as Frances Griffiths Kath Hughes as Polly Wright Nish Kumar as Himself Alexander Kirk as Arthur Wright Matthew Steer as Edward Gardner Tom Stourton as Thomas Watson James Meehan as Theosophist
