Episode Title:Out of the Fire and Into the Boiling Sea.Episode Description:With no other hope of saving Wu, Kai and Nya are forced to enter the sunken library of Hono Mizu in the Boiling Sea, a volcanic region where their parents hid the Reversal Time Blade. Using their father's Dragon Blade, they combine their elements to form a Fusion Dragon and enter the dangerous environment, where they face numerous obstacles. Meanwhile, Lloyd and the others set out to rescue Cyrus Borg, only to learn that he has rigged a self-destruct feature on the Iron Doom. In an ensuing battle with Blunck and Raggmunk's Tribe of Vermillion warriors, the Ninja are joined by Samurai X, who has arrived seeking to save Borg as well after hacking into Zane's sensors. Kai and Nya succeed in retrieving the blade, only to lose it to Acronix and Krux after Ray is struck with a Time Punch. Kai, Nya, their parents, and Wu are then left falling to their doom but survive by forming the Fusion Dragon yet again. The Time Twins return to their base, and after thwarting Borg's sabotage order all their forces into the Iron Doom, which then enters a temporal vortex with the Fusion Dragon in hot pursuit.