Guest Stars Craig Parkinson as DI Matthew "Dot" Cottan Gregory Piper as Ryan Pilkington Aiysha Hart as DS Sam Railston Polly Walker as Gill Biggeloe Elizabeth Rider as DCC Andrea Wise Ace Bhatti as PCC Rohan Sindwhani Amy De Bhrún as Steph Corbett Rochenda Sandall as Lisa McQueen Taj Atwal as PC Tatleen Sohota Patrick Fitzsymons as DCI Mark Moffatt Richard Pepple as PS Kyle Ferringham Susan Vidler as DSU Alison Powell Peter de Jersey as Rossport Laura Elphinstone as DI Michelle Brandyce Natalie Gavin as PS Martina Tranter Credit Only Stephen Graham as DS John Corbett