This episode features Fredrik Gunnarsson, who played the regular cast character Svartman in the Swedish adaptation Wallander (2005).
Sarah Smart (Anne-Britt Hoglund) & David Warner (Povel Wallander) also worked together on The Secret of Crickley Hall (2012) as Magda Cribben & Percy Judd respectively.
Jeany Spark (Linda Wallander) & Sarah Smart (Anne-Britt Hoglund) also worked together on episode 1.5, Spot the Difference (2011), of Death in Paradise (2011) as Emilie Saunders & Suzie Park respectively.
There is a Swedish sequel to this, or rather to the novel on which it is based: Mastermind (2005), with Krister Henriksson as Wallander.