Thrillers are a genre of literature, film, video gaming and television programming that uses suspense, tension, and excitement as the main elements. The primary subgenre is psychological thrillers. After the assassination of President Kennedy, political thriller and paranoid thriller films became very popular. The brightest examples of thrillers are the films of Alfred Hitchcock.

Thrillers heavily stimulate the viewer's moods such as; a high level of anticipation, ultra-heightened expectation, uncertainty, anxiety, suspense, excitement, tension, terror. Literary devices such as red herrings and cliffhangers are used extensively. The cover-up of important information from the viewer and fight/chase scenes are common methods in all of the thriller subgenres, although each subgenre has its own characteristics and methods.

Common methods in crime thrillers are mainly ransoms, captivities, heists, revenge, kidnappings. More common in mystery thrillers are investigations and the whodunit technique. Common elements in psychological thrillers are mind games, psychological themes, stalking, confinement/deathtraps, horror-of-personality, and obsession. Elements such as fringe theories, false accusations, paranoia, and sometimes action are common in paranoid thrillers."Homer's Odyssey is one of the oldest stories in the Western world and is regarded as an early prototype of the thriller." A thriller is villain-driven plot, whereby he presents obstacles that the hero must overcome.