Thriller films aim to elicit heightened feelings of suspense, excitement, and anticipation in viewers. There are numerous subgenres of thriller films including science fiction, crime, film noir, religious, action, and psychological thrillers. The document discusses several key elements that define thriller films including conventions such as camera techniques, editing, audio, and lighting. It also explores symbolic codes within thrillers involving settings, mise-en-scene, acting, and use of color.