Nigel identifies a paint chip from a dead suspect's shoe as "...having been specially formulated for the now-defunct Swann-Flanders Construction Company". This is an apt thing for Brit Nigel to say. The team of Michael Flanders and Donald Swann were one of England's most popular musical teams through the '60s, composing songs and light opera. Best known for their comic revues "At the Drop of a Hat" and "At the Drop of Another Hat", they also composed music for many poems written by J.R.R. Tolkien which appeared in "The Hobbit", "The Lord of the Rings" and other of his works.