Overview: The X-Men carry out an investigation that leads them to the U-Men, a group of mad scientists whose hideout contains a horrifying secret.
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First Air Date: Apr 01, 2011Last Air date: Jun 24, 2011Season: 1 SeasonEpisode: 12 EpisodeRuntime: 24 minutesQuality: HDIMDb: 7.30 / 10 by 157 usersPopularity: 22.067Language: Japanese