Chipchase Castle features as the stately home in this episode.
Clare Calbraith makes the first of seven appearances in this episode as Captain Shepard a Military Police officer.
Collingwood Monument is an important background to several scenes including the final shots.
This was actually the second story in this series but it was pulled from the TV schedule due to real life events at the time and shown later in the year. The mention of Hollie leaving and Vera's book regarding angina substantiate this.
The army barracks scenes were shot in a number of places. The TT Electronics factory at Bedlington, St Mary College in Newcastle and the former Prudhoe Hospital along with some private houses which were used for interior shots.