created by Anthony Horowitz ; written by Anthony Horowitz and David Kane ; produced by Jeremy Gwilt ; directed by Stuart Orme and Andy Hay ; Eleventh Hour Films in association with Acorn Media Group, Inc. and Octagon Films Limited
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
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