Guest Stars Naomi Battrick as Diana Stainton Alice Orr-Ewing as Caroline Allpass Andrew French as Sergeant-at-arms Nick Malinowski as Returning Officer Morgan Watkins as Mike Steele Daryl McCormack as Luke Mackenzie Anthony O'Donnell as Leo Abse Nicholas Blane as Norman Van de Water Susan Wooldridge as Countess of Arran Ben Moor as BBC Radio Interviewer Michelle Fox as Lyn John Bett as Lord Kilmuir Chris Ashby as Messenger