This is the first of two episodes that Jack Galloway appears in, the other being "A Man of Sorrows" in Series 6. In this episode his character deals in drugs. In the other episode he plays a character who dies from a drug overdose.
Both John Nettles and Annette Badlands starred in many episodes of Midsomer Murders, although not at the same time.
First time John Nettles' character is seen playing guitar.