This is the 100th episode of Midsomer Murders. Producers were keen to mark the milestone with a Danish special starring actors from Forbrydelsen (2007) and Borgen (2010) due to the popularity of Midsomer Murders in Denmark.
There is a Calders biscuits calendar hanging in the office of Barnaby and Nelson. The picture Is of Sanjeev Bhaskar who, in this episode, works for the Calders company.
The first episode filmed outside the U.K. Death and Dust (2007) was the first to be filmed outside England.
The plot pulls from Hamlet. Complete with a Danish tie-in
The Maltings Amersham which was the filming location for Calders factory in this episode was also used I. The episode Sauce for the goose.