Zodiac is a 2007 American mystery film directed by David Fincher and based on Robert Graysmith's non-fiction book of the same name. The Paramount Pictures and Warner Bros. joint production stars Jake Gyllenhaal, Mark Ruffalo, Robert Downey, Jr. and Chloë Sevigny.

Zodiac tells the story of the hunt for a notorious serial killer known as "Zodiac" who killed in and around the San Francisco Bay Area during the late 1960s and early 1970s, leaving several victims in his wake and taunting police with letters and ciphers mailed to newspapers. The case remains one of San Francisco's most infamous unsolved crimes.

Fincher, screenwriter James Vanderbilt, and producer Brad Fischer spent 18 months conducting their own investigation and research into the Zodiac murders. During filming, Fincher employed the digital Thomson Viper Filmstream camera to shoot the film. Contrary to popular belief, Zodiac was not shot entirely digitally; traditional high-speed film cameras were used for slow-motion murder sequences.

In both astrology and historical astronomy, the zodiac (Greek: ζῳδιακός, zōdiakos) is a circle of twelve 30° divisions of celestial longitude that are centered upon the ecliptic: the apparent path of the Sun across the celestial sphere over the course of the year. The paths of the Moon and visible planets also remain close to the ecliptic, within the belt of the zodiac, which extends 8-9° north or south of the ecliptic, as measured in celestial latitude. Historically, these twelve divisions are called signs. Essentially, the zodiac is a celestial coordinate system, or more specifically an ecliptic coordinate system, which takes the ecliptic as the origin of latitude, and the position of the sun at vernal equinox as the origin of longitude.

It is known to have been in use by the Roman era, based on concepts inherited by Hellenistic astronomy from Babylonian astronomy of the Chaldean period (mid-1st millennium BC), which, in turn, derived from an earlier system of lists of stars along the ecliptic. The construction of the zodiac is described in Ptolemy's Almagest (2nd century AD).

A film, also called a movie or motion picture, is a series of still or moving images. It is produced by recording photographic images with cameras, or by creating images using animation techniques or visual effects. The process of filmmaking has developed into an art form and industry.

Films are cultural artifacts created by specific cultures, which reflect those cultures, and, in turn, affect them. Film is considered to be an important art form, a source of popular entertainment and a powerful method for educating – or indoctrinating – citizens. The visual elements of cinema give motion pictures a universal power of communication. Some films have become popular worldwide attractions by using dubbing or subtitles that translate the dialogue into the language of the viewer.

Films are made up of a series of individual images called frames. When these images are shown rapidly in succession, a viewer has the illusion that motion is occurring. The viewer cannot see the flickering between frames due to an effect known as persistence of vision, whereby the eye retains a visual image for a fraction of a second after the source has been removed. Viewers perceive motion due to a psychological effect called beta movement.

The Zodiac Killer was a serial killer who operated in Northern California in the late 1960s and early 1970s. The killer's identity remains unknown. The Zodiac murdered victims in Benicia, Vallejo, Lake Berryessa and San Francisco between December 1968 and October 1969. Four men and three women between the ages of 16 and 29 were targeted. The killer originated the name "Zodiac" in a series of taunting letters sent to the local Bay Area press. These letters included four cryptograms (or ciphers). Of the four cryptograms sent, only one has been definitively solved.

Numerous suspects have been named by law enforcement and amateur investigators, but no conclusive evidence has surfaced. In April 2004, the San Francisco Police Department marked the case "inactive," yet re-opened the case at some point prior to March 2007.^{[dead link]} The case also remains open in the city of Vallejo, as well as in Napa County and Solano County. The California Department of Justice has maintained an open case file on the Zodiac murders since 1969.

Jackie Chan, SBS, MBE (born Chan Kong-sang, 陳港生; 7 April 1954) is a Hong Kong-born Chinesestuntman, actor, and director whose perilous acrobatic stunts and engaging physical humour made him an action-film star in Asia and helped to bring kung fu movies into the mainstream of American cinema. In his movies, he is known for his acrobatic fighting style, comic timing, use of improvised weapons, and innovative stunts. Jackie Chan has been acting since the 1960s and has appeared in over 100 films.

Chan has received stars on the Hong Kong Avenue of Stars and the Hollywood Walk of Fame. As a cultural icon, Chan has been referenced in various pop songs, cartoons, and video games. An operatically trained vocalist, Chan is also a Cantopop and Mandopop star, having released a number of albums and sung many of the theme songs for the films in which he has starred. In addition to acting, Chan pursued a career in the Hong Kong music industry, releasing a number of original albums beginning in 1984. He founded the Jackie Chan Charitable Organization in 1998, which, among other projects, offers scholarships to Hong Kong youths, and he worked as a goodwill ambassador for UNICEF.