Thrillers are characterized by fast pacing, frequent action, and resourceful
heroes who must thwart the plans of more-powerful and better-equipped
villains.
Literary devices such as
suspense,
red herrings and
cliffhangers are used extensively.
Thrillers often take place wholly or partly in exotic settings such as foreign cities, deserts, polar regions, or high seas.
The heroes in most thrillers are frequently "hard men" accustomed to danger: law enforcement officers, spies, soldiers, seamen or aviators. However, they may also be ordinary citizens drawn into danger by accident. While such heroes have traditionally been men.
Thrillers often overlap with mystery stories, but are distinguished by the structure of their plots.
In a thriller, the hero must thwart the plans of an enemy, rather than uncover a crime that has already happened. Thrillers also occur on a much grander scale: the crimes that must be prevented are serial or mass murder, terrorism, assassination, or the overthrow of governments. Jeopardy and violent confrontations are standard plot elements. While a
mystery climaxes when the mystery is solved, a thriller climaxes when the
hero finally defeats the
villain.
In thrillers influenced by
film noir and
tragedy, the compromised
hero is often killed in the process.
Ominous or monstrous element has become common to heighten tension.
Many thrillers involve spies and espionage, but not all spy stories are thrillers.
Thrillers may be defined by the primary mood that they elicit: fearful excitement. In short, if it 'thrills', it is a thriller.
Sub-genre
Action thriller - In which the work often features a race against the clock, contains lots of violence, and an obvious antagonist. These films usually contain large amounts of guns, explosions, and large elaborate set pieces for the action to take place.
Conspiracy thriller - In which the hero/heroine confronts a large, powerful group of enemies whose true extent only he/she recognizes.
Crime thriller - This particular genre is a hybrid type of both
crime films and thrillers that offers a suspenseful account of a successful or failed crime or crimes. These films often focus on the criminal(s) rather than a policeman. Crime thrillers usually emphasize action over psychological aspects. Central topics of these films include murders, robberies, chases, shootouts, and double-crosses are central ingredients.
Disaster thriller - In which the main conflict is due to some sort of natural or artificial disaster, such as floods, earthquakes, hurricanes, volcanoes, etc., or nuclear disasters as an artificial disaster.
Drama thriller - In which the story consists of the elements of a thriller and
drama film. These films are usually slower paced and involves a great deal of character development along with
plot twists.
Eco-thriller - In which the protagonist must avert or rectify an environmental or biological calamity - often in addition to dealing with the usual types of enemies or obstacles present in other thriller genres. This environmental component often forms a central message or theme of the story.
Erotic thriller - In which it consists of
erotica and thriller.
Horror thriller - In which conflict between the main characters are mental, emotional, and physical. What sets the horror thriller apart is the main element of fear throughout the story. The main character(s) is not only up against a superior force, but they are or will soon become the victims themselves and directly feel the fear that comes by attracting the monster's attention.
Legal thriller - In which the lawyer-heroes/heroines confront enemies outside, as well as inside, the courtroom and are in danger of losing not only their cases but their lives.
Medical thriller - In which the hero/heroine are doctors or medical personnels working to solve an expanding medical problem
Political thriller - In which the hero/heroine must ensure the stability of the government that employs him.
Psychological thriller - In which (until the often violent resolution) the conflict between the main characters is mental and emotional, rather than physical.
Spy thriller (also a subgenre of
spy fiction) - In which the hero is generally a government agent who must take violent action against agents of a rival government or (in recent years) terrorists.
Supernatural thriller - In which the conflict is between main characters, usually one of which has supernatural powers. This type of thriller combines tension of the regular thriller with such basic horror oriented ingredients as
ghosts, the
occult, and psychic phenomenon; the supernatural thriller combines these with a frightening but often restrained film. They also generally eschew the more graphic elements of the horror film in favor of sustaining a mood of menace and unpredictability; supernatural thrillers often find the protagonists either battling a malevolent paranormal force or trapped in a situation seemingly influenced or controlled by an other-worldly entity beyond their comprehension.
Techno-thriller - A work that usually focuses upon military action, in which technology (usually military technology) is described in detail and made essential to the reader's/viewer's understanding of the plot.
Most thrillers are formed in some combination of the above, with horror, conspiracy, and psychological tricks used most commonly to heighten tension.