This document discusses several subgenres of thriller films including crime thrillers, psychological thrillers, medical thrillers, and political thrillers. Crime thrillers fictionalize crimes and their detection, featuring protagonists and antagonists where the antagonist is often in danger. Psychological thrillers build tension slowly until an explicit action scene, using locations and costumes to create a sense of normality within insanity. Medical thrillers involve medical tools or viruses becoming deadly weapons, focusing on sterile, cold settings and discussions over action. Political thrillers center on threats to the government and protagonists employed to stop declines, featuring conspiracies and conflicts of power.