John Nettles stated in an interview that this episode of Midsomer Murders was his favourite.
When the woman staffing the theater box office learns Barnaby's identity, she asks if he is the one who investigated the throat-cutting in "the Shaffer play" -- this is a reference to 'Death of a Hollow Man' (Season 1, Episode 3), whose action centers around a performance of Peter Shaffer's 'Amadeus'.
Just before the scene where Mrs Merrill is meeting with Mr Mitchell, the location is established with a brief shot of a clubhouse for a golf course. This is the same course where James Bond played a round with Goldfinger.
Debbie Chazen plays Anna Santarosa in this episode. She returns in episode 11.4, Midsomer Life (2008), in the role of Gemma Platt.