Thriller films aim to keep audiences on the edge of their seats through mystery and suspense. They typically start normally but then introduce threats to main characters. Tension is built using enigma codes, twists, mysterious music and sounds, and ominous settings in black and gray. Key characters include the protagonist facing threat from the antagonist enemy. Editing uses suspenseful music and quick clips to engage audiences without boring them. Subgenres like psychological thrillers focus on mental instability, while hybrid genres mix elements of different types of thrillers.