John Simm Det. Sup. Roy Grace Actor Richie Campbell DI Glenn Branson Actor Zoe Tapper Cleo Morey Actor Laura Elphinstone DS Bella Moy Actor Brad Morrison DC Nick Nicholl Actor Sam Hoare ACC Cassian Pewe Actor Rebecca Scroggs Ari Branson Actor Juliette Motamed DC Vee Wilde Actor Holli Dempsey Sam Fordwater Actor Mark Noble Johnny Fordwater Actor Amy Trigg Louise Fordwater Actor Michael Shea Ben Close , Rupert Thomas Actor Juliet Oldfield Emily Harton Actor Cat Simmons Charlotte Seward Actor Syrus Lowe Jarvis Brookes Actor Lexi Austin-Jones Duty Manager Actor Emma Dears Medical Director Actor Emily Swain Head of Surgery Actor Jessica Whitehurst Bobby Actor Hasan Dixon Tom Driver Actor Bobby Lockwood Gym Staff Member Actor Nicola Wright Angela Actor Rob Compton Dan Actor Russell Barnett Colin Actor Finn Guegan Bruno Actor Margot Leicester Margot Balkwill Actor Liam Smith Ronnie Close Actor Ben Cutler Toby Seward Actor Sara Matin Georgina Driver Actor Briony Scarlett Aisha Actor Kiaran Murray-Smith Producer Matthew Slater Original Music Andrew O'Connor Executive Producer Patrick Schweitzer Executive Producer Russell Lewis Executive Producer Peter James Executive Producer Paul Sandler Executive Producer Guy Burt Writer Jon East Director