X-Men

The X-Men were a superhero team. Most accounts agreed that the X-Men where the epynomynous team from the X-Men comic book and film series by Marvel Comics Group, (PROSE: The Scarlet Empress, Forever Autumn, Digging up the Past) however some accounts where unclear, depicting the X-Men team as potentially real. (PROSE: The Good Doctor)

The Eighth Doctor was a big X-Men fan. (PROSE: The Scarlet Empress)

Rick Pirelli had an X-Men movie poster in his room. (PROSE: Forever Autumn)

Storm was a member of the X-Men. (PROSE: The Good Doctor)

After the Great Cock Up of 2107, humanity lost most of western literature, but managed to salvage a complete run of X-Men comics. (PROSE: Digging up the Past)

Cindy Wu mistook Cerebravore for the name of the X-Men's mutant-detection computer. (COMIC: The Fountains of Forever)

Behind the scenes

 * Wolverine, Lucas Bishop and Nightcrawler are members of the X-Men.
 * Additionally, the Marvel film depicts the X-Men comics as existing within the main continuity of the films. Therefore, it is plausible that the same could be said for the references to X-Men as fact and fiction in DWU sources.
 * In-universe parodies of X-Men include T-Men (COMIC: The Fourth Wall) and Zz-Men. (COMIC: Give Free or Die)
 * The Shi'ar Empire is mentioned in PROSE: The Quantum Archangel.
 * The name of the mutant-detection computer from X-Men is in fact.
 * Steve Lyons wrote an X-Men novel trilogy, The Legacy Quest.
 * Patrick Stewart, who played Professor Charles Xavier in several X-Men movies, was considered for the roles of both the Doctor and the Master in the 1996 TV movie.
 * Ian McKellen played Magneto in the original film trilogy, and Days of Future Past.
 * In 2017, Alan Cumming, who played Nightcrawler in the 2003 film X2, said that he had been approached about playing the Doctor on two occasions, once by Russell T Davies and once by Mark Gatiss, but that the deal-breaker both times had been his reluctance to relocate to Cardiff.
 * The mask worn by Korwin in TV: 42 was partly inspired by X-Men mutant Cyclops.