Wolf Films ; created by Dick Wolf ; directed by Ed Sherin ... [and others] ; written by Kathy McCormick .. [and others] ; produced by Billy Fox ... [and others].
created by Dick Wolf ; directed by Ed Sherin ... [and others] ; written by Michael S. Chernuchin .. [and others] ; story by David Black ... [and others].
created by Matthew Hall ; written by Matthew Hall & Pip Broughton ; produced by Pip Broughton, Llyr Morus ; directed by Pip Broughton, Judith Dine ; a Vox Pictures production for S4C, BBC Cymru Wales ; co-produced by Acorn Media Enterprises in association with Nevision, Welsh Government & About Premium Content