The voice of Kreacher and voice of Dobby from the Harry Potter films both appear in this episode. Kreacher was by Simon McBurney and Dobby was by Toby Jones.
First episode broadcast in wide-screen.
James Bolam later played a much more capable retired policeman in the New Tricks (2003-13) series.
Richard Johnson plays James Fitzroy in this episode. He returns in episode 10.2, The Animal Within (2007), in the role of Rex Masters.
Dominic Mafham plays Grahame Tranter in this episode. He returns in episode 13.7, Not in My Back Yard (2011), in the role of James Otley.