series created and written by Heidi Thomas ; written by Louise Ironside, Carolyn Bonnyman, Andrea Gibb, Debbie O'Malley, Lisa Holdsworth, Amy Roberts & Loren McLaughlan ; produced by Ann Tricklebank ; directed by Syd Macartney, Kate Saxon, David O'Neill, Christiana Ebohon, Kate Cheeseman ; Neal Street Productions for BBC and PBS
a Neal Street Production for BBC and PBS ; producer, Ann Tricklebank ; series created and written by Heidi Thomas ; directors, Juliet May [and four others]
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