This chapter investigates the link between the music and the film. Before elaborating on the different modes of intermedial use of music, the authors will shed light on Russell's path leading to particular film, his admiration for Mahler's music and some parallels between Mahler's music and Russell's films. In several scenes, Russell illustrates the influence on Mahler's music of ambient and natural sounds, showing how the composer integrated them into his work. Russell illustrates and adapts the music precisely and in detail, not only referring to elements of the specific context in which Mahler created the cited works but also enriching the film with explicit and implicit meaning present in the music. The interaction between music and film opens up a complex and fascinating interaction, thus creating an enlightened portrait of both the composer and his music and of Russell's musical fascination and imagination.