In , titled " Winter Solstice, Part 2: Avatar Roku ," Aang must reach the Fire Temple on Crescent Island during the winter solstice to communicate with his predecessor, Avatar Roku. Key Plot Points
: Aang, Katara, and Sokka fly Appa into Fire Nation territory, narrowly escaping a naval blockade led by Admiral Zhao . Prince Zuko also risks his life by entering Fire Nation waters to pursue Aang. [S1E8] Avatar Roku: Winter Solstice, Part 2
: Roku appears to Aang and warns him about Sozin’s Comet . He explains that the comet will return by the end of summer, granting firebenders enough power to win the war unless Aang masters all four elements before then. In , titled " Winter Solstice, Part 2: