a Kudos Film and Television production for BBC Wales ; co-created by Matthew Graham, Ashley Pharoah, Tony Jordan ; produced by Claire Parker ; directed by Bharat Nalluri ... [and others] ; written by Matthew Graham .. [and others].
the Rank Organisation presents ; Michael Relph and Basil Dearden's production ; original screenplay by Janet Green ; additional dialogue by Lukas Heller ; produced by Michael Relph ; directed by Basil Dearden
a Kudos Film and Television production for BBC Wales ; produced by Cameron Roach ; directed by S.J. Clarkson, Richard Clark, and Andrew Gunn ; co-created by Tony Jordan, Ashley Pharoah, Matthew Graham ; written by Matthew Graham ... [and others]
a co-production of ITA Studios Limited and WGBH Boston in association with Agatha Christie Ltd. ; produced by Karen Thrussell ; directed by Ashley Pearce, Philip Martin, and Dan Reed ; screenplays by Stewart Harcourt, Peter Flannery, and Guy Andrews
Greenlit Productions, produced in association with Paddock Productions ; written by Anthony Horowitz, Matthew Hall, Michael Russell ; directed by Jeremy Silberston, Giles Foster
Greenlit Productions, produced in association with Paddock Productions ; written by Anthony Horowitz ; directed by Gavin Millar, Jeremy Silberston, and Tristram Powell
Greenlit Productions, produced in association with Paddock Productions ; written by Anthony Horowitz and Rob Heyland ; directed by Gavin Millar and Jeremy Silberston