Guest Stars Erin Shanagher as Fiona Baker 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 Fehinti Balogun as Greg Sullivan Bronagh Waugh as DC Stella Beckett Marcus Garvey as DC Roly Dalton 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 Lucy Chambers as Chloe Tuckman Ian Puleston-Davies as Donald Vernon Phillip Langhorne as Dominic Banley