Guest Stars Nina Sosanya as Chief Superintendent Rachel Waite Jessica Barden as Stella Macken Julie Graham as Marianne Gower Ron Cook as Brian Gower Emily Woof as Janice Ronson Co Starring Sonya Cassidy as Celine Ashworth Rose Leslie as Lena Holgate Brogan West as Dougie Cranham Steven Hartley as Sgt. Stuart Macken Sarah Lewis Obuba as Young Woman Jon Regan as Witness 2 Joe MacCabe as Duty PC Charlie Richmond as Witness 1 Richard Stacey as Grant Bellowes