By Damian Wayling. When a body dredged up from a lake implicates an ex-police officer and a respected headteacher, DCI Stone has a difficult decision to make as he discovers the real truth that lies behind the murder. Stone ...... Hugo Speer Catriona ...... Zoe Henry Thomas ...... Rob Pickavance Sally ...... Danielle Henry Tanner ...... Craig Cheetham Chloe/DS Addison ...... Maxine Burth Tyler ...... Reece Noi Wise ...... James Nickerson Piotra/Lawler ...... Greg Wood Directed by Nadia Molinari.