Episode 4 The families of Sian and Becky discover that, despite the confession of Christopher Halliwell, getting justice for their loved ones will not be straightforward. Details Casts Videos Galleries Posters Season Lists Title Episode 4 Genres Crime Drama Release Date 2019-09-23 Episode Runtime 00 Hours 45 Minutes Season Number 1 Episode Number 4 Production Companies Unknown Martin Freeman... Steve Fulcher... Siobhan Finneran... Elaine Pickford... Imelda Staunton... Karen Edwards... Peter Wight... Charlie Edwards... Derek Riddell... Pete... Owain Arthur... DI Sean Memory... Jake Davies... Liam O'Callaghan... Jessica D'Arcy... Lora O'Callaghan... Ian Puleston-Davies... Mick O'Callaghan... Kate Ashfield... Yvonne Fulcher... Joe Absolom... Christopher Halliwell... Daniel Betts... Mike Veale... Charlie Cooper... Kevin Reape... A Confession: as told by ITV News | ITV News (Clip) A Confession | Monday 2nd September | ITV (Trailer) Original Size (3840x2160) Original Size (1920x1080) Original Size (3840x2160) Original Size (1960x1102) Original Size (3840x2160) Original Size (3840x2160) Original Size (1920x1080) Original Size (3840x2160) Original Size (1140x1710) Original Size (1500x2250) Original Size (800x1200) Original Size (2000x3000) Season 1 6 Episode(s) 2019-09-02