The Danger Room is a fictional training facility built for the X-Men of Marvel Comics. The X-Men are a group of comic book superheroes featured in Marvel Comics. ... It has been suggested that Felicia (pseudonym) be merged into this article or section. ...

In the early books it was filled with traps, projectile firing devices, and mechanical dangers such as presses, collapsing walls and the like intended to challenge the trainee. Meanwhile, an observer is in the overhanging control booth managing the room's mechanisms to oversee the exercise while ensuring the subject's safety. Later the Danger Room was upgraded with robots for the X-Men to fight against.

After befriending the Shi'ar the X-Men rebuilt the Danger Room with Shi'ar hard-light holographic technology. These upgrades were largely added by Dr. Hank McCoy (Beast). The Danger Room is located in the X-Mansion; every destruction of the latter led to a rebuilding, and usually upgrading, of the Danger Room. The training facility has endured a lot of damage over the years, usually from X-Men trainings or X-Men going rogue, as Colossus did during a Shadow King arc. Supervillains have often taken over the facility, most notably Arcade. The Shiar, also called the Aerie, are a fictional species of aliens in the Marvel Comics universe. ... This article is about the photographic technique. ... Beast, sometimes called The Beast (real name: Dr. Hank McCoy), is a Marvel Comics superhero, a member of the X-Men. ... Colossus (Piotr Rasputin) is a Marvel Comics superhero, a member of the X-Men. ... The Shadow King (real name Amahl Farouk) is a fictional character, a mutant supervillain in the Marvel Comics universe. ... The Green Goblin, a supervillain and enemy of Spider-Man. ... Arcade is a fictional character and supervillain in the Marvel Comics universe. ...

Recently in Joss Whedon's Astonishing X-Men, the Danger Room has taken up sentience, attacked the X-Men and traveled to Genosha to kill Professor Xavier. As a sentient it has been named "Danger" and taken on a female appearance. Xavier was revealed to have known about "Danger" existing in the confines of the Danger Room and chose not to reveal it, much to the dismay of the X-Men who seem to view this deception as a taking on of Magneto's former ideals. Joss Whedon at the premiere of Serenity. ... Cover of Astonishing X-Men volume 3 issue #12. ... Sentience is a capacity for basic consciousness—the ability to feel or perceive, not necessarily including the faculty of self-awareness. ... This article or section is missing references or citation of sources. ... For the Brooklyn, NY rapper Professor X, see X-Clan. ... Sentience is the capacity for basic consciousness -- the ability to feel or perceive, not necessarily including the faculty of self-awareness. ...

With its female appearance destroyed by Beast, the "Danger's" consciousness is presumed to still exist within the conflicted consciousness of the monstrous Sentinel that destroyed Genosha. The Sentinels are a type of fictional robot in the Marvel Comics universe. ... This article or section is missing references or citation of sources. ...

The Danger Room makes a brief appearance in X-Men: The Last Stand.