Thrillers are a broad genre that overlap with other genres, featuring fast pacing, action, and a hero and villain storyline. They aim to keep audiences interested through surprises and red herrings. Thrillers come in many types including spy, political, military, conspiracy, medical, religious, forensic, psychological, disaster, and legal thrillers. Characteristics include overlapping with mysteries, featuring mass murders to drive the plot, using confrontation, including cliffhangers or the villain's death, varying budgets between American and British films, and exotic settings.