Faye Dunaway's performance is seen entirely in flashback sequences and is also completely in black-and-white because all the flashbacks are in b&w. One of the film's main movie posters featuring thumbnail photos of the cast has Dunaway's picture like the others in color.
A Royal Charity Premiere for the film was held during February 1985 in the presence of Queen Elizabeth II and Prince Philip. The event was held at the Classic Cinema off Piccadilly and was attended by such stars of the film as Donald Sutherland, Faye Dunaway and Diana Quick. The Gala Charity Premiere Benefit was held in aid of the King George's Fund for Sailors. Reportedly, Queen Elizabeth II gave away the plot of the film when she apparently jokingly said to Dunaway, "I gather you are the one the gets killed off frightfully early - how sad".
Dave Brubeck replaced Pino Donaggio as music score composer. The original score was not Brubeck but by 'Donaggio who wrote his typical, lush and beautiful music. When the film didn't test well, they decided to jettison the Donaggio score and replace it with Brubeck's music. Brubeck was told he'd have two weeks to write an original score. Brubeck replied and said no. They then agreed that they'd use already existing Brubeck tunes and newly record them. Brubeck's jazzy muzak score was frequently negatively received by both critics and audiences.
The scene with Christopher Plummer shooting a rabbit in the woods was filmed in New Jersey and not Devon, where the rest of the film was shot. This was a scene added after principal photography had been completed - and Christopher Plummer could not return to work in England for tax reasons.
Agatha Christie's daughter, who had approval of the script, was initially concerned that 'Michael Elphick''s police inspector, modeled to some extent after a harder-nosed American-style police officer, would prove unpopular among the local constabulary in Devon, where she lived.
This 1984 movie was the first of two consecutive filmed adaptations of Agatha Christie novels in back-to-back years for actress Faye Dunaway. The second was 1985's made-for-television Thirteen at Dinner (1985) which was a TV adaptation of "Lord Edgware Dies" (1933).
This 1984 movie was the second mystery movie based on a novel by a famous mystery writer in consecutive years for director Desmond Davis who the previous 1983 year had helmed a television adaptation of Sir Arthur Conan Doyle's The Sign of Four (1983).