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
Greenlit Productions, produced in association with Paddock Productions ; written by Anthony Horowitz and Michael Chaplin ; directed by Tristram Powell and Simon Langton
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