In another Miss Marple Inspector Craddock tells Inspector Slack that MissMarple is his aunt.
There is a discrepancy in the story of when Miss Blacklock quit her job. Miss Blacklock states she left Randall Goedler's firm when he died, but Belle Goedler tells Inspector Craddock that she left to take care of her sister when their father died and Randall was furious.
Kevin Whatley plays a Detective Sergeant, assistant to a Detective Inspector, a precursor to his role as Inspector Morse's assistant.
The Scottish location, Ardverikie House also featured in Monarch of the Glen, The Crown, Outlander, Mrs Brown, Salmon Fishing in the Yemen, Outlaw King and the James Bond film No Time To Die.
In the film you hear of a son called Harry; at the end of the film there is a wedding and you see the son, played by Simon Rose who lived in the village of Powerstock where the film was shot.