- "Who's John?"
- —Gwyn Davies[src]
John may refer to several things:
- Episodes
- "Guest Starring John Noble", the seventeenth episode of the third season of DC's Legends of Tomorrow, and the fiftieth episode overall.
- Characters
- John Diggle, a member of Team Arrow also known as Spartan.
- J'onn J'onzz, a Green Martian who works as a private investigator under the name John Jones (the anglicized form of his real name).
- John Diggle, a member of Team Arrow of Earth-16.
- John Diggle, an individual from Earth-TUD25.
- John Bolen, the husband of Vickie Bolen.
- John Diggle, Jr., the son of John Diggle and Lyla Michaels.
- John Diggle, Jr., the second Green Arrow of Earth-16.
- John Constantine, an exorcist, demonologist, master of the dark arts, and a former member of the Legends.
- John Wayne Gacy, a serial killer from Earth-1.
- John Sharp, the father of Evelyn Sharp and former H.I.V.E. test subject.
- John James, the abusive former foster father of Frankie Kane.
- John Corben, the first Metallo.
- John F. Kennedy, a former President of the United States.
- J.R.R. Tolkien, a famous author whose full name is John Ronald Reuel Tolkien.
- John Lennon, a member of the Beatles.
- John Burke, a businessman targeted by Komodo.
- John Carron, an agent of A.R.G.U.S..
- John Le, a former agent of A.R.G.U.S..
- John Swigert, a NASA astronaut.
- John Deleon, an individual on "The List".
- John Nickel, an individual on "The List".
- John Nelson, an individual on "The List".
- John Trujillo, a friend of Ray Terrill.
- John Trujillo, a member of the Freedom Fighters from Earth-X known as Black Condor.
- John, John Diggle's Earth-90 doppelgänger.
- Jonathan Kent, the son of Clark Kent and Lois Lane, sometimes referred to as "Jon" by family and friends.
- John, a vigilante from Earth-203 known as Darkstrike.
- John Deegan, a former psychiatrist of Arkham Asylum.
- John Byrne, a criminal whose name was on "The List".
- John Henry Irons, a soldier from Earth-TUD22.
- John Henry Irons, a counter insurgence specialist from Earth-TUD25.
- Cast/Crew
- John Barrowman, the actor who portrayed Malcolm Merlyn/Dark Archer.
- John Wesley Shipp, the actor who portrayed Henry Allen, Jay Garrick/The Flash, and Barry Allen/The Flash.
- Jon Cryer, the actor who portrayed Lex Luthor.
- Jon Cor, the actor who portrayed Mark Blaine/Chillblaine.
- John Noble, the actor who voiced Mallus and briefly portrayed a fictionalized version of himself.
- John Behring, a director.
- John Beran, a key grip.
- John Branagan, a stunt performer.
- John Casino, a stunt performer.
- John Cihangir, a stunt performer.
- John Gilbert, a stunt rigger.
- Jon Johnson, a stunt performer.
- Jon Kralt, an assistant stunt coordinator, stunt performer, and fight coordinator.
- John Kretchmer, a director.
- John MacDonald, a stunt performer.
- John Mattingly, an assistant director.
- John Francis Moore, a writer, story editor, and executive story consultant.
- John James Nania, a stunt performer.
- John O'Neill, a key grip.
- John Pierce, a visual effects supervisor.
- John Raunch, a comic book colorist.
- John Ross, an actor, stuntman, and stunt rigger.
- John Showalter, a director.
- John Stoneham Jr., a stunt performer.
- John Vorhaus, a writer.
- Jon Wallace, an associate producer.