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