a Ruby Television production in association with AL Films for BBC, co-produced with WGBH Boston ; screenplay by Paula Milne and Sarah Williams ; produced by Joanna Anderson, Vicky Licorish, and Grainne Marmion ; directed by John Alexander
a Hartswood Films production for BBC Wales in co-production with Masterpiece ; co-created by Mark Gatiss & Steven Moffat ; written by Mark Gatiss, Steven Moffat and Steve Thompson ; series producer Sue Vertue ; executive producers Beryl Vertue, Steven Moffat, Mark Gatiss, Bethan Jones ; directed by Jeremy Lovering, Colm McCarthy, Nick Hurran
a DreamWorks Pictures and Reliance Entertainment presentation ; in association with New Republic Pictures ; a Neal Street Production ; produced in association with Mogambo ; directed by Sam Mendes ; written by Sam Mendes & Krysty Wilson-Cairns ; produced by Sam Mendes, Pippa Harris, Jayne-Ann Tenggren, Callum McDougall, Brian Oliver
the Weinstein Company presents a Black Bear Pictures production ; a Bristol Automotive production ; produced by Nora Grossman, Ido Ostrowsky, Teddy Schwarzman ; written by Graham Moore ; directed by Morten Tyldum
created by Mark Gatiss, Steven Moffat ; produced by Sue Vertue ; executive producer Masterpiece, Rebecca Eaton ; executive producer for BBC, Bethan Jones ; executive producers, Mark Gatiss, Steven Moffat, Beryl Vertue ; Hartswood Films production for BBC, Cymru Wales in co-production with Masterpiece