Guest Stars Cal MacAninch as David Loader Ed Stoppard as James Embleton James Burrows as Derren Blackburn 2013 Velile Tshabalala as Kristen Wayne Foskett as Brian Blackburn Jake Arrowsmith as Peter Hancock Mark Womack as Tom Hancock Adie Allen as Stella Hancock Teresa Banham as Alison Ryder Tim Preece as George Ryder David Westhead as DI Bob Cherry Richard Johnson as Sir William Embleton Anna Jaskolka as Agency Nurse Nicola Goodchild as Jennifer Larsen