The location used for the Art Deco style Farley's Factory was a Hoover vacuum cleaner factory built in the 1930s west of London. The building is still intact but has been converted to a Tesco supermarket.
When Benedict Farley comes in to switch on his latest line of pies, a small brass band is playing. The bandmaster doing the conducting is Christopher Gunning. Christopher Gunning was the composer for the main POIROT theme.
Based on the short story of the same name from "The Adventure of the Christmas Pudding" (1960)
Joely Richardson's mother Vanessa Redgrave starred in the 1974 "Murder on the Orient Express", another Hercule Poirot mystery
Alan Howard and Joely Richardson have both starred in Peter Greenaway films: Richardson as the young Cisey in Drowning by Numbers and Howard in The Cook, The Thief, His Wife and Her Lover (he being The Lover).