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 Carolina Valdés Nadiuska De Sancha Actor Margot Leicester Margot Balkwill Actor Josef Davies Daniel 'Danny' Starr Actor Lovelace Akpojaro Officer Johnson Actor Cat Simmons Charlotte Seward Actor Kiran Landa Sara Joshi Actor Syrus Lowe Jarvis Brookes Actor Emma Dears Medical Director Actor Finn Guegan Bruno Actor Bobby Lockwood Gym Staff Member Actor Nicola Wright Angela Actor Paul Clayton Judge Channing Actor Kiaran Murray-Smith Producer, Executive 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 Ed Whitmore Writer Jess Williams Writer Caroline Carver Writer Guy Burt Writer Nirpal Bhogal Director Jon East Director Jon Jones Director Imogen Murphy Director Phil Hunter Executive Producer