Thriller films have evolved over time from the 1920s onwards. Alfred Hitchcock dominated the genre in the 1920s-1950s with films like The Lodger, Blackmail, and Psycho. While Hitchcock led the genre, other directors like Michael Powell and Orson Welles also made notable thrillers. In the 1970s-1980s, thrillers became more violent with films like Frenzy while the genre struggled after Hitchcock's death. Contemporary thrillers include the Saw franchise as well as television shows like Dexter and Homeland. Common thriller elements include suspenseful narratives, protagonists restoring order, and cinematography like POV shots that immerse viewers.