In the latest developments of the main Hellsing storyline, Walter is captured by The Captain of the Millennium Organization during their invasion of England. He has gone through a similar process to the Major and the Doc's troops (although hastily conducted, according to the Doc), and now appears forty or so years younger, serving as Millennium's new secret weapon (when the Major sees the finished product, he remarks "It was determined 55 years ago that you would join us"). Walter himself does not add many more details, both affirming he was brainwashed to fight Hellsing, and that he is fighting of his own free will against Alucard. In Volume 9 of Hellsing, Walter has leaped from his perch on one of Alucard's stakes to confront him, crushing what was left of Alexander Anderson underfoot, saying that people become trash once they are dead, and that trash should not be mourned for. He then tells everyone he was brainwashed and rejuvenated. When Seras intervenes, Walter asks if she would like more the explanation that he is fighting of his own free will against Alucard. Enraged by his desecration of Father Anderson's remains, Yumie attacks him, but is easily outmatched and cut into pieces in a single move. After listening as Walter explains himself, Alucard criticizes his decision, saying that his old, aged body was many times more beautiful than his new, unnaturally youthful one. He also makes ironic use of the statement "If we cannot have our prosperity with pride then we should reject such prosperity". This comment was made by Walter, but referenced by Alucard to mock Walter's hypocrisy regarding his fear of becoming old and useless. Also, during Walter's brief fight with the Captain, the Major's dialogue seems to imply his previous remark meant he had made the choice to forcefully draft Walter into Millennium ever since witnessing his feats of power during WWII.