Guest Stars James McKenna as Sgt. Don Brady David McKail as Dr. Mackenzie Caroline Harker as WPC Hazel Wallace Elizabeth Rider as Helen Burrell Paterson Joseph as Colin Stokes Jim Sturgess as Laurence Burrell Maurice Roëves as Stuart Mackintosh Jane Gurnett as Janet Carter Rob Spendlove as Martin Burrell Wayne Foskett as Les Jameson Michael Jenn as Alec McGuiness Andy de la Tour as Oscar Manning Mike Savage as Bill Duggan Sheila Whitfield as Sally Stokes Jimmy Yuill as Charles Lightfoot