Saruman than in their equivalent books, and he appears in several scenes that are not depicted in Tolkien's work. In the films, Saruman is depicted presenting himself outright as a servant of Sauron. Smith and Matthews suggest that Saruman's role is built up as a substitute for Sauron—the story's main antagonist—who never appears directly in the book. Jackson confirms this view in the commentary to the DVD. They also suggest that having secured veteran British horror actor Christopher Lee to play Saruman, it made sense to make greater use of his star status. Despite this increased role in the first two
Saruman of the Ring"; in one version he considers throwing himself on Gandalf's mercy. There is also a description of how Saruman becomes involved with the Shire and of how he gradually becomes jealous of Gandalf. Another brief account describes how the five Istari were chosen by the Valar for their mission. Tolkien had been writing "The Lord of the Rings" for several years when Saruman came into existence as the solution to a long-unresolved plot development, and his role and characteristics continued to emerge in the course of writing. Tolkien started work on the book in late 1937, but was