When 'David Heartley-Reade' goes fishing he has a creel over his shoulder.
But is seen carrying his trout in his left hand.
Nicholas Rowe plays David Heartley-Reade in this episode. He returns in episode 15.5, The Sicilian Defence (2013), in the role of Edward Stannington.
The mill where Nathan and Harry Green reside is the historic Mapledurham Watermill in the English county of Oxfordshire. It was featured on the cover of Black Sabbath's self-titled debut album in 1970.
In the breakfast scene near the start, DCI Tom Barnaby is revealed to be a reader of The Daily Telegraph.