Deadlier Than the Male intrigue when he comes to visit. The title is a reference to the 1911 Rudyard Kipling poem "The Female of the Species," which includes the line, "The female of the species must be deadlier than the male", and also refers to Sapper's earlier Drummond book, "The Female of the Species". The working title of the film was "The Female of the Species". "Deadlier Than the Male", the song featured in the film`s opening credit sequence, was performed by the Walker Brothers. Filmed in Technicolor and Techniscope, portions of the film were shot in Lerici, La Spezia, Liguria, Italy. A sequel,
More Deadly Than the Male little drama in which Richard makes ardent love to her and is caught by her husband who is then shot and killed in the encounter that follows. Up to this point all has gone as planned, but the police step in and take Richard into custody. Helen is forced to produce her "dead" brother who played the role of her husband, and explains to the police that it was only a trick. Richard admires the woman's cleverness, admits his love, and decides to forego any further world travels. This is now considered to be a lost film. More Deadly Than