The Danger Room is a fictional training facility[1] appearing in American comic books published by Marvel Comics. It first appeared in The X-Men #1 (September 1963) and was created by Stan Lee and Jack Kirby. The facility is depicted as built for the X-Men as part of the various incarnations of the X-Mansion. Its primary purpose is to train the X-Men, initially using traps, projectile firing devices, flamethrowers, and mechanical dangers such as presses and collapsing walls. These were replaced by holographics, when the Danger Room was rebuilt using Shi'ar technology. It gained sentience in Astonishing X-Men as Danger.
An obstacle course in which the X-Men train appears in The X-Men #1 (September 1963), but the Danger Room is never mentioned by name. The name "Danger Room" is first used in The X-Men #2 (November 1963). According to X-Men writer/editor/co-creator Stan Lee, "the Danger Room was Jack Kirby's idea. I thought it was great because we could always open with an action sequence if we needed to."[2]
Early designs
Panel from The X-Men #1 (September 1963) showing Beast training. Art by Jack Kirby.
In the early books, the Danger Room was filled with traps, projectile firing devices, flamethrowers, 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[3] managing the room's mechanisms to oversee the exercise while manually ensuring the subject's safety. Later the Danger Room was upgraded with machines and robots for the X-Men to fight against.[4]
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 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 extensive damage over the years, usually from X-Men training or X-Men going rogue, as Colossus did during the Muir Island Saga. Supervillains have dealt critical damage to it as well as taking over the facility, especially Arcade. The security and safety protocols that ensure the safety of anyone using the Danger Room have frequently been disrupted, tampered with by villains, failed, or have been completely negated over time.
It is suggested in the X-Men Official Guide that the objects in the Danger Room are holograms surrounded by force fields, supposedly confirmed in Astonishing X-Men when a student managed to kill himself by jumping from a holographic cliff face. It is also revealed that the Danger Room can display holograms in only 32-bit color.
With the Danger Room gone, the X-Men resorted to using the empty room to train with their students. The student Prodigy, using the borrowed knowledge from several X-Men, built a "Danger Cave" underneath the X-Mansion. The Danger Cave is similar to the Danger Room, but it uses holograms to train the students by re-enacting renowned battles the X-Men were involved in, like Inferno or Onslaught, even going so far as to dress the participants up in what the X-Men wore at that time.[citation needed]
Reception
The Danger Room is well known and viewed as an iconic part of the X-Men mythos.[5][bettersourceneeded]
Other versions
Age of Apocalypse
The Danger Room equivalent in the Age of Apocalypse reality was the Killing Zone. The facility was located in Mount Wundagore[6] and was apparently destroyed by Nemesis. Later, it was Dazzler who replaced the Danger Room and acted as a one-woman training facility for the fully fledged X-Men.[volume&issueneeded]
Ultimate Marvel
The Ultimate Marvel version of the Danger Room has similar technology, including smaller holographic training rooms in the hidden safehouses prepared for the X-Men. However, these are prone to malfunctions, such as a fight sequence producing Hasidicrabbis instead of ninjas (though to no less of an effect towards the latter intent).[volume&issueneeded]
What If?
Danger became Ultron's wife
In the alternate universe of What If? Astonishing X-Men, the Danger Room got a body of her own and betrayed the X-Men. She eventually married Ultron and the two conquered Earth, the Shi'ar Empire and the entire universe.[7]
The Danger Room was meant to appear in X-Men (2000) and was alluded to in X2 (2003), but was deleted in the former film and was scrapped in the latter film due to budget concerns.
The Danger Room appears in X-Men Legends and X-Men Legends II: Rise of Apocalypse, voiced by Zachary Quarles.[citation needed] In both games, players can use the room for training as well as gaining levels, items, new powers, and rare character-exclusive equipment.
↑"Master Mold Voice - Wolverine and the X-Men (TV Show)". Behind The Voice Actors. Retrieved December 26, 2025. A green check mark indicates that a role has been confirmed using a screenshot (or collage of screenshots) of a title's list of voice actors and their respective characters found in its credits or other reliable sources of information.
↑"Danger Room Computer - Marvel Ultimate Alliance 3: The Black Order (Video Game)". Behind The Voice Actors. Retrieved March 30, 2020. A green check mark indicates that a role has been confirmed using a screenshot (or collage of screenshots) of a title's list of voice actors and their respective characters found in its credits or other reliable sources of information.{{cite web}}: CS1 maint: postscript (link)
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