Friday the 13th is an American horror franchise that comprises twelve slasher films, a television series, novels, comic books, video games, and tie‑in merchandise. The franchise mainly focuses on the fictional character Jason Voorhees, who was thought to have drowned as a boy at Camp Crystal Lake due to the negligence of the camp staff. Decades later, the lake is rumored to be "cursed" and is the setting for a series of mass murders. Jason is featured in all of the films, as either the killer or the motivation for the killings. The original film, created to cash in on the success of Halloween (1978), was written by Victor Miller and was produced and directed by Sean S. Cunningham. The films have grossed over $468 million at the box-office worldwide.
Frank Mancuso, Jr., a producer of the films, also developed the television show Friday the 13th: The Series after Paramount released Jason Lives. The television series was not connected to the franchise by any character or setting, but was created based on the idea of "bad luck and curses", which the film series symbolized. While the franchise was owned by Paramount, four films were adapted into novels, with Friday the 13th Part III adapted by two separate authors. When the franchise was sold to New Line Cinema, Cunningham returned as a producer to oversee two additional films, in addition to a crossover film with character Freddy Krueger from A Nightmare on Elm Street film series. Under New Line Cinema, thirteen novellas and various comic book series featuring Jason were published.

Although the films were not popular with critics, Friday the 13th is considered one of the most successful media franchises in America—not only for the success of the films, but also because of the extensive merchandising and repeated references to the series in popular culture. The franchise's popularity has generated a fanbase who have created their own Friday the 13th films, fashioned replica Jason Voorhees costumes, and tattooed their bodies with Friday the 13th artwork. Jason's hockey mask has become one of the most recognizable images in horror and popular culture.

Films
In the original Friday the 13th (1980), Mrs. Pamela Voorhees (Betsy Palmer) stalks and murders the teenagers preparing Camp Crystal Lake for re‑opening. She is determined to ensure the camp does not reopen, after her son Jason (Ari Lehman) drowned in the lake, due to the negligence of two staff members. The last counselor, Alice Hardy (Adrienne King), fends off Mrs. Voorhees long enough to grab a machete and decapitate her. In Friday the 13th Part 2 (1981), Jason (Steve Daskewisz/Warrington Gillette) is revealed to be alive and fully grown. After killing Alice Hardy, Jason returns to Crystal Lake to guard it from all intruders. Five years later, a group of teenagers arrive at Crystal Lake to be trained as camp counselors, but Jason murders them. Ginny Field (Amy Steel), the last counselor Jason attempts to kill, finds a cabin in the woods with a shrine built around the severed head of Mrs. Voorhees. Ginny fights back and slams a machete through Jason's shoulder. Jason is left for dead as Ginny is taken away in an ambulance.

During the events of Friday the 13th Part III (1982), Jason (Richard Brooker) removes the machete from his shoulder and finds his way to Chris Higgins' (Dana Kimmell) local homestead. Chris returns to her property with some teens, and Jason kills anyone who wanders into the barn where he is hiding. Taking a hockey mask from a victim to hide his face, Jason leaves the barn to kill the rest of the group. Chris seemingly kills Jason with an axe to his head, but the night's events drive her into hysteria as the police take her away. Friday the 13th: The Final Chapter (1984) continues where Part III leaves off, with Jason (Ted White) found by the police and taken to the local morgue after removing the axe. Upon arrival, Jason awakens to kill the coroner and a nurse before returning to Crystal Lake. A group of teens rents a house on Crystal Lake and fall victim to Jason's rampage. After killing the teens, Jason seeks out Trish (Kimberly Beck) and Tommy Jarvis (Corey Feldman), who live next door. While distracted by Trish, Jason is attacked and ultimately killed by Tommy.





