Gary Carr plays a clerical worker in this episode & as well as the previous one. He returns in episodes 15.7 & 15.8 in the role of Myers.
Tom Ward (Harry Cunningham) & Gary Carr (Clerical Worker) also worked together on episode 2.1, Murder on the Plantation (2013), of Death in Paradise (2011) as Alex Seymour & Sergeant Fidel Best respectively.