There is a reference in this episode to the famous Jarrow March, when a group of unemployed men marched to London from Jarrow in the North of England. This places the events in the year 1936.
This episode has been criticized for turning Agatha Christie's colourful and zany household of students into a duller bunch. In particular, the charming African, Akibombo, and the punctilious Indian, Ram Lal, were left out of the production.
David Burke, who appears in Hickory Dickory Dock as the dying Sir Arthur Stanley, is better known as Dr Watson to Jeremy Brett's Sherlock Holmes in another Granada Television series - see TV.com's guide to Sherlock Holmes (1984) .