PBS ; a co-production of ITV Studios/Masterpiece ; produced by Chris Burt ; directors, David Drury, Matthew Evans, Nick Laughland ; writers, Nick Hicks-Beach, Helen Jenkins, Chris Murray
Agatha Christie Ltd. ; directed by Andrew Grieve, Stephan Whittaker, and Ross Devenish ; produced by Brian Eastman ; screenplays by Clive Exton, William Humble
ITV Studios and Masterpiece ; series producer Dominic Barlow ; producer, Jeremy Piven ; directed by Robert Del Maestro, Bill Anderson, Fraser MacDonald, Joss Agnew, and Rob Evans ; written by Helen Raynor, Kate O'Riordan, Matt Jones, James Payne, Ben Morris, and Hamish Wright ; created by Andrew Davies ; developed by Kate Brooke
an ITV Studios and WGBH Boston co-production ; produced by Chris Burt ; directors, Nick Renton, Nick Lughland, and David Drury ; writers, Helen Jenkins, Noel Farragher, and Nick Hicks-Beach