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