as "a futuristic superroom into which Professor Xavier wheels over a bridge in order to don the helmet that would magnify his already extraordinary telepathic powers and project the results onto the skull-like internal walls of the room." In the films X-Men and X2: X-Men United, Cerebro is a device that fills a massive spherical room in the basement of Xavier's School. The helmet interface is similar to the version seen in the comics, although the bulk of Cerebro's machinery is contained in the surrounding walls. While in use, three-dimensional images of the humans whose minds are being scanned by the device appear around the interface bridge. Unlike the comics' version of Cerebro, the film version can detect both human and mutant minds with ease. The unique signature of mutant brainwaves is shown in the first film by the mental images of humans depicted in black and white, while those of mutants show up in red. When Xavier illustrates his connection with every human and mutant mind on Earth in the sequel, X2, mutants appear in red, and humans in white. In the first film, Professor X mentions to Wolverine that Magneto helped him build it, and therefore knows how to construct helmets with circuitry to block its detection abilities. Cerebro is sabotaged by Mystique so that it injures Professor X, putting him into a coma. The only person seen using Cerebro effectively in the films is Xavier; Jean Grey successfully used the device to locate Magneto in the original film, but the input overwhelmed her nascent telepathic power and left her stunned. This has not been mentioned in the comics, although the Magneto of the comics can use Cerebro, and has designed similar devices. X2: X-Men United In X2: X-Men United, the device was copied and modified by William Stryker in his plot to have a brainwashed Xavier use his Cerebro-amplified powers to kill the world's mutants, although this plan was later 'hi-jacked' by Magneto—immune to the telepathic assault via his helmet—so that Xavier would be used to kill humans. According to X2, it is difficult to pinpoint the location of mutants who have the ability to teleport and are constantly in transit, such as Nightcrawler. In both films, Magneto's helmet is capable of blocking the telepathic signals from Cerebro, as well as any telepathic mutants. X-Men: First Class In X-Men: First Class, an early version of Cerebro exists