Kaizoku Sentai Gokaiger

The Amazing Silver-Colored Man (1x17)

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When Navi's next clue mentions a "Silver Man," the Gokaiger crew goes out to find him using the sixth warrior Ranger Keys acquired from Basco ta Jolokia to fight Action Commander Almadon who wants to bomb the city. And the Gokaigers are approached by an Earthling young man who wants to be their sixth member.