ITV Global ; series created by Jill Hyem and Lavinia Warner ; written by Jill Hyem, Colin Shindler, and Kevin Clarke ; directed by Gordon Flemyng ; produced by Colin Shindler and Lavinia Warner
ITV Studios ; ITV Studios Global Entertainment ; writers, Martha Hillier, Glen Laker, Paul Matthew Thompson ; producer, Letitia Knight ; directors, Marek Losey, Jill Robertson, Jamie Childs, Paul Gay
ITV Studios ; ITV Studios Global Entertainment ; written by Paul Matthew Thompson, Paul Logue, Martha Hillier ; producer, Letitia Knight ; directed by Paul Gay, David Leon, Chris Baugh, Lee Haven Jones
Agatha Christie Ltd. ; ITV Global Entertainment ; screenplays by Clive Exton ... [and others] ; directed by Edward Bennett and Renny Rye ; produced by Brian Eastman
Agatha Christie Ltd. ; directed by Andrew Grieve, Stephan Whittaker, and Ross Devenish ; produced by Brian Eastman ; screenplays by Clive Exton, William Humble