a BBC Cymru Wales Drama Production ; executive producers, Brian Minchin and Steven Moffat ; directed by Jamie Payne ; written by Steven Moffat ; produced by Marcus Wilson
produced by Cecil O'Connor, Greg Spence ; written by Craig Mazin, Neil Druckmann ; directed by Craig Mazin, Neil Druckmann, Peter Hoar, Jeremy Webb, Jasmila Žbanić, Liza Johnson and Ali Abbasi ; created for television by Craig Mazin & Neil Druckmann