Thrillers became popular after JFK's assassination due to rising public fear. They typically involve psychological or paranoid elements to engage audiences. Historically, thrillers featured heroes overcoming villains' obstacles. Common characteristics include keeping audiences on the edge of their seats through tension and impossible traps for the hero. Thrillers usually climax with the hero defeating the villain to save lives. Iconic directors like Hitchcock and Scott expertly use suspense and pace to portray innocent people caught in circumstances beyond their control.