Guest Stars Jim Sweeney as Andrew MacDonald Gerard Horan as Quartermaster John O'Sullivan Julian Wadham as Lord General George Murray Sam Hoare as Harold "Hal" Grey Kimberley Nixon as Millie Nelson Colin Stinton as Dean Jackson John Mclarnon as Gordon Killick Roger Ringrose as Dr. Thorne Garry Summers as Anesthesiologist Joanna Harte as Nurse Oliver Tilney as Lieutenent Wallace Rory Barraclough as Frederick MacBean Ryan Ralph Gerrard as Giles McMartin Greg Esplin as Hamish
