Comics

• Mister X (Amalgam Comics), a character from the intercompany crossover
• Mister X (Marvel Comics), a supervillain in the Marvel Universe
• Mister X (Vortex)
  Mister X (Vortex)
  Mister X was a series of comic books first published in 1983–90 by Toronto-based Vortex Comics. Created by album and book cover designer Dean Motter, it was developed for a year in close collaboration with comic artist and illustrator Paul Rivoche, whose series of poster illustrations stirred up...
  
  , the protagonist in Dean Motter's comic book series of that title

Video games

• Mr. X (Elite Beat Agents), a character from the Elite Beat Agents series
• Mr. X, the villain in the video game series Streets of Rage
  Streets of Rage
  Streets of Rage, known in Japan as , is a side-scrolling beat 'em up released by Sega in 1991 for the Sega Mega Drive/Genesis. It is the first installment of the Streets of Rage series which was followed by Streets of Rage 2 and Streets of Rage 3. The game was also converted over to Sega's Game...
  
  
• The villain in the video game The Ship
  The Ship (computer game)
  The Ship: Murder Party is a first person shooter computer game using Valve Software's Source engine developed by Outerlight. The game was released on July 11, 2006, on Steam with retail distribution in Europe and Australia in September, and April 10, 2007, for North America...
  
  
• The final villain in the video game Kung-Fu Master
• The pseudonym of Dr. Wily in Mega Man 6
  Mega Man 6
  Mega Man 6, known in Japan as , is a video game developed by Capcom for the Nintendo Entertainment System . It is the sixth installment in the original Mega Man series and was originally released in Japan on October 5, 1993 and in North America the following March. It was included in the Mega Man...
  
  
• The pseudonym of Olga in Metal Gear Solid 2
• T-103, AKA Mr. X, a Tyrant beast in Resident Evil 2

Movies and television

• Mr. X, a recurring puppet on The Canadian Howdy Doody Show
• Mr. X, in the cartoon series The X's
• Mr. X (Simpsons), Homer's pseudonym in the Simpsons episode "The Computer Wore Menace Shoes"
• X (The X-Files)
  X (The X-Files)
  X, sometimes referred to as Mr. X, is a fictional character on the American science fiction television series The X-Files. He serves as an informant, leaking information to FBI Special Agent Fox Mulder to aid Mulder's investigation of paranormal cases, dubbed X-Files...
  
  , a character in the television series The X-Files
• The Amazing Mr. X
  The Amazing Mr. X
  The Amazing Mr. X, also known as The Spiritualist is a film noir directed by Bernard Vorhaus with cinematography by John Alton. Like Nightmare Alley , this film tells the story of a phony spiritualist racket...
  
  , a.k.a. The Spiritualist, a 1948 thriller film
• Mr. X, an assassin in the 2008 film Wanted, played by David O'Hara

Music

• "Mr X", a song by Ultravox from their album Vienna
  Vienna (album)
  Vienna is the fourth studio LP by the synthpop band Ultravox, first released on 11 July 1980. The album peaked at #3 in the UK charts and was the first Ultravox release to enter the UK top ten. It was certified Platinum in the United Kingdom in July 1981 for 300,000 copies sold...
  
  
• "Mr X", a song and single by Pauline Murray And The Invisible Girls

Pseudonymous uses

• Donald E. Graves
  Donald E. Graves
  Donald Edward Graves was a State Department analyst who specialized in studying the government of the USSR. As a Kremlinologist, Donald Graves tracked the personal history of individual Soviet officials. These files, profiled in the 1982 Washington Post story, "The Secret Files of Mr...
  
  , American Kremlinologist, from the 1982 Washington Post article "The Secret Files of Mr. X"
• George F. Kennan
  George F. Kennan
  George Frost Kennan was an American adviser, diplomat, political scientist and historian, best known as "the father of containment" and as a key figure in the emergence of the Cold War...
  
  , American historian, in his essay "The Sources of Soviet Conduct"
• Carl Sagan
  Carl Sagan
  Carl Edward Sagan was an American astronomer, astrophysicist, cosmologist, author, science popularizer and science communicator in astronomy and natural sciences. He published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books...
  
  , American astronomer, in an essay on his experiences with marijuana
• Norman Wexler
  Norman Wexler
  Norman Wexler was a screenwriter whose work included such films as Saturday Night Fever, Serpico and Joe, for which he received an Oscar nomination in 1971...
  
  , American screenwriter, in Bob Zmuda's Andy Kaufman Revealed
• Mister X (prisoner)
  Mister X (prisoner)
  Mister X, also Mr. X and Prisoner X, are placeholder names for a prisoner allegedly being held for unspecified crimes in Israel's maximum security Ayalon jail. A source in the Israel Prison Service claimed that the individual is a "terrorist" with a history of involvement with a banned organization...
  
  , a placeholder name for a prisoner allegedly being held for unspecified crimes in Israel
• The former longtime boyfriend of American radio talk show host, Robin Quivers
  Robin Quivers
  Robin Ophelia Quivers is an American radio personality, most notable for being the long-running news anchor and co-host of The Howard Stern Show. Born in Baltimore, Maryland, Quivers graduated from the University of Maryland with a major in nursing. In 1975, she joined the United States Air Force...
  
  

Other uses

• Mr. X, a masked professional wrestler in the WWF in the 1980s, one of the identities of Dan Marsh
  Dan Marsh
  Dan Marsh is a former professional wrestling referee and wrestler most famous as Danny Davis of the World Wrestling Federation. He also competed in the WWF for several years as Mr. X, a masked wrestler....
  
  
• Mr X, a novel by Peter Straub
  Peter Straub
  Peter Francis Straub is an American author and poet, most famous for his work in the horror genre. His horror fiction has received numerous literary honors such as the Bram Stoker Award, World Fantasy Award, and International Horror Guild Award, placing him among the most-honored horror authors in...
  
  
• Mr. X, a player character
  Player character
  A player character or playable character is a character in a video game or role playing game who is controlled or controllable by a player, and is typically a protagonist of the story told in the course of the game. A player character is a persona of the player who controls it. Player characters...
  
   in the Scotland Yard
  Scotland Yard (board game)
  Scotland Yard is a board game in which a team of players, as "police", cooperate to track down a player controlling a "criminal" around a board representing the streets of London. It is named after Scotland Yard, the headquarters of London's Metropolitan Police Service...
  
   board game
  Board game
  A board game is a game which involves counters or pieces being moved on a pre-marked surface or "board", according to a set of rules. Games may be based on pure strategy, chance or a mixture of the two, and usually have a goal which a player aims to achieve...
  
   and its spin-off, "Mister X".
• Mister X, an alias used by Mayuka Kondō in the manga and anime series, Oniichan no Koto Nanka Zenzen Suki Janain Dakara ne!!
  Oniichan no Koto Nanka Zenzen Suki Janain Dakara ne!!
  is a Japanese seinen manga series written and illustrated by Kouichi Kusano which began serialization on Futabasha's Web Comic High! service from August 2008. It has been licensed in North America by Seven Seas Entertainment...
  
  

See also

• Doctor X (disambiguation)
• Miss X
• Professor X
  Professor X
  Professor Charles Francis Xavier, also known as Professor X, is a fictional character, a Marvel Comics superhero known as the leader and founder of the X-Men....
  
  
• Nomen nescio
  Nomen nescio
  Nomen nescio, abbreviated to N.N., is used to signify an anonymous or non-specific person. From Latin nomen, name, and nescire, not to know, be ignorant of. Together, I do not know the name....
  
   (often abbreviated as N.N.)
• John Doe
  John Doe
  The name "John Doe" is used as a placeholder name in a legal action, case or discussion for a male party, whose true identity is unknown or must be withheld for legal reasons. The name is also used to refer to a male corpse or hospital patient whose identity is unknown...
  
  
• X (disambiguation)
  X (disambiguation)
  -Language:*Chi , the twenty-second letter of the Greek alphabet, often used to abbreviate "Christ". Cf. Chi Rho*Kha, a letter in the Cyrillic alphabet*Ḫāʼ, a letter in the Arabic alphabet...