During rehearsals for the scene where Wimsey (Edward Petherbridge) and Climpson (Shirley Cain) have tea together, Wimsey's monocle fell into his tea. Despite numerous attempts, they could not recreate this hilarious incident for the camera.
The title is taken from a version of the poem "Lord Randall."
In an early scene, a bus passes by with an advertisement for Guinness beer, for which Dorothy Sayers wrote advertisements in real life. She used this experience as the background for a later Lord Peter novel, Murder Must Advertise.
Story based on "Strong Poison" by Dorothy L. Sayers and is the first Lord Peter Wimsey novel to feature Harriet Vane. Harriet Vane is featured in 3 additional Wimsey novels; 2 of which have been adapted for television and star Edward Petherbridge and Harriet Walter.
Story based on "Strong Poison" by Dorothy L. Sayers. This is book number #6 in the Lord Peter Wimsey series and serves to introduce Harriet Vane, who was later featured in her own spin-off mystery series.