In the previous episode, Eleanor Harker takes Kavanagh to a movie theater to see Korczak (1990) by Andrzej Wajda. Wojciech Pszoniak, who played the role of Korczak, appears in this episode as victim's uncle.
The case Kavanagh indirectly refers to when Aldermarten and he defended a young couple accused of child murder was a fourth season episode entitled "Care in the Community."