Watch the credits and you'll see some seemingly random red letters appear in the names of the crew. These letters spell out "Auguries of Innocence," a poem written by William Blake. Lines of this poem are spoken by Mrs. Lee and Miss Marple: "Every Night & every Morn Some to Misery are Born Every Morn and every Night Some are Born to sweet delight Some are Born to sweet delight Some are Born to Endless Night "