The X-Men return to Japan to probe the site where mysterious secondary mutations have occurred.

Cast: Steve Blum, Cam Clarke, Ali Hillis, Aya Hisakawa, Katsunosuke Hori, Haruhiko Jô, Rikiya Koyama, Toshiyuki Morikawa, Danielle Nicolet, Scott Porter, Stephanie Sheh, Michael Sinterniklaas, Yukari Tamura, Hideyuki Tanaka, Fred Tatasciore