Guest Stars Tom Bell as DS Bill Otley Robert Pugh as DS Alun Simms Frank Finlay as Arnold Tennison Ellie Kendrick as Melanie Eve Best as Linda Philips Stephen Tompkinson as Sean Philips Brendan Coyle as DCS Mitchell Carolyn Pickles as Pauline Gary Lewis as Tony Sturdy Katy Murphy as Ruth Sturdy Ricky Nixon as Lester Bishop Maxine Barton as Sallie Sturdy Amandla Crichlow as Gloria Heshima Thompson as Curtis Flynn Helen Griffin as AA Speaker Russell Mabey as Cox Laura Doddington as Wood David Keyes as AA Speaker Laura Greenwood as Penny Philips Tim Preece as AA Speaker Robbie Gee as DI Traynor Alex Blake as AA Speaker Nonso Anozie as Robert Ashley Madekwe as Tanya Sydney Rae White as Girl on Heath Rebecca Clay as Staff Nurse Clive Hayward as Pathologist Lee Whitlock as Jeremy Sharon Maharaj as Consultant Seroca Davis as Delores Dystin Johnson as Staff Nurse