Guest Stars Bronagh Waugh as DC Stella Beckett Phil Davis as DI Liam Cox Amy Wren as Gemma Hillman Catherine Tyldesley as Kate Tuckman Sarah Niles as DCI Jill Conroy Dominic Allburn as Carl Tuckman Marcus Garvey as DC Roly Dalton Erin Shanagher as Fiona Baker Fehinti Balogun as Greg Sullivan Shannon Murray as Hayley Jones Karen Henthorn as Janice Baines Andrew Hawley as Tim Kíla Lord Cassidy as Caitlin Sterling Hubert Hanowicz as Pavel Ludic Sia Kiwa as Melissa Nicola Holt as Nadia Bailey