Wikipedia:
The Four Horsemen usually refers to the Four Horsemen of the Apocalypse, who are the forces of man's destruction as described in the Christian Bible in chapter six of the Book of Revelation.
Other uses:
Entertainment
Four Horsemen (Highlander), a group of Immortals on the television show Highlander: The SeriesThe Horsemen of the Apocralypse (Discworld), from the Discworld series of books by Terry PratchettThe Four Horsemen of the Apocalypse (video game), a video game by 3DOHorsemen of Apocalypse, a team of Marvel Comics superhumans who serve X-Men supervillain ApocalypseFour Horsemen Studios, action figure sculptors for McFarlane ToysFour Horsemen, four contestants in the reality television series Survivor: FijiFour Horseman, Four contestants in the reality television series "Big Brother"Four Horsemen, the name of the 4 leaders of the ultranationalist party in Call of Duty 4: Modern WarfareFour Horsemen, a boss encounter in Naxxramas, a raid from World of WarcraftFour Horsemen, the playable characters in the Darksiders series by VigilFour Horsemen in the Transformers: Energon series
Sports and games
Four Horsemen (professional wrestling), group of professional wrestlersFour Horsemen (American football), American football players from University of Notre Dame in 1924The Four Horsemen of Aberdeen, see Blackjack Hall of FameThe Four Horsemen, a contract bridge team; original 1931 members: P. Hal Sims, Willard S. Karn, David Burnstine (Bruce), Oswald Jacoby
Music
"The Four Horsemen", a song on Metallica's 1983 album Kill 'Em All"The Four Horsemen", a song on Judas Priest's 2008 album Nostradamus"The Four Horsemen", an Aphrodite's Child song from their album 666The Four Horsemen (band), a late '80s / half '90s hard rock band from HollywoodThe Four Horsemen (rap group), rap group formed by Canibus, Killah Priest, Ras Kass & KuruptThe Four Horsemen, sound-poetry group in Toronto, see Steve McCaffery"Four Horsemen" (song), a song on The Clash's 1979 album London CallingThe Four Horsemen (album), a 1993 album by Ultramagnetic MC's"Four Horsemen of 2012", a song by Klaxons from the album Myths of the Near Future (Also "4 Horsemen of 2012" from Xan Valleys EP)
Science
Other
Four Horsemen (Supreme Court), United States Supreme Court conservative justices during the New Deal eraSenior scientists and consultants to NASA during Apollo: Bob Walker; Jim Arnold; Paul Werner Gast; Gerry WasserburgFormer west coast boutique investment banks: Robertson Stephens, Alex. Brown & Sons, Hambrecht & Quist, and Montgomery SecuritiesFour Horsemen (drink), a cocktail containing four hard liquors and named after the Four Horsemen of the Apocalypse"The Four Horsemen", an informal discussion on the "New Atheism" held in 2007 and its proponents: Richard Dawkins, Daniel C. Dennett, Sam Harris, and the late Christopher Hitchens.Four Horsemen (Jericho episode), the third episode of season one of the CBS drama JerichoCanadian sound-poetry group Four Horsemen, consisting of bpNichol, Paul Dutton, Steve McCaffery and Rafael Barreto-Rivera