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