Task. 20: The Brand-New Giant (Task.20 新たなる巨人 Tasuku Touentī: Aratanaru Kyojin) is the twentieth episode of GoGo Sentai Boukenger. It concludes the initial arc against the Ashu Tribe/Questers with the first appearance both of Bouken Silver's mecha, SirenBuilder and the concept of the "Quester Robo" which Gai and Rei will use from here on for their giant battles.