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 Ace Bhatti as PCC Rohan Sindwhani Elizabeth Rider as DCC Andrea Wise Amy De Bhrún as Steph Corbett Taj Atwal as PC Tatleen Sohota Rochenda Sandall as Lisa McQueen 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