The novel on which this film is based was written by its author, poet Kenneth Fearing, as revenge on publisher Henry Luce and his "Time" magazine, where Fearing was obliged to work (for financial reasons) for many years. The fearsome Earl Janoth is often regarded as a libelous parody of Luce, although the book was given a rave review in "Time" when it was first published, as was the film.
When producer Richard Maibaum first came on the set, director John Farrow who liked to intimidate people who worked with him, kept him at a distance by using a walking stick. Maibaum turned around, went to the props department and returned with a baseball bat. As if a spell were broken, the situation immediately improved and Maibaum and Farrow would go on to have an excellent working relationship.
When George Stroud asks the operator to call Pauline York's apartment, the number he asks for begins with BUtterfield8. This was a telephone exchange in a ritzy part of upper Manhattan. Just as Pauline met her demise in this part of town, so did Elizabeth Taylor's character twelve years later in her academy award winning role of Gloria, a high-priced call girl in 1960's BUtterfield8.