Dryden referred to a former paramour as a "bunny boiler". The phrase is derived from the film Fatal Attraction (1987), where the mistress played by Glenn Close, places his pet rabbit in a boiling pot, because he would not leave his wife.
Mark Bonnar (Dryden) & Henry Pettigrew (Cole) also worked together on New Blood (2016) as Peter Mayhew & Bruce Lockwood respectively, as well as on two episodes of Shetland (2013) as Duncan Hunter & Iain Redford respectively.
This episode was also released under the title "Taste of Freedom".
Last Words is the fifth episode of the second series of Line of Duty and the tenth overall episode which was first broadcast on BBC Two on the 12 March 2014.