Greenlit Productions, produced in association with Paddock Productions ; produced by Simon Passmore and Jill Green ; written and created by Anthony Horowitz ; directed by Jeremy Silberston and David Thacker
a Ruby Television production in association with AL Films for BBC, co-produced with WGBH Boston ; screenplay by Paula Milne and Sarah Williams ; produced by Joanna Anderson, Vicky Licorish, and Grainne Marmion ; directed by John Alexander