Both Aang and Zuko must learn the history of how the war began. Zuko learns a secret about his great-grandfather's past.
Did You Know?
At one point Katara wonders whether they have bathrooms in the spirit world, to which Sokka replies: "As a matter of fact, they do not". This is a reference to episode 7 ("Winter Solstice, Part 1"), in which Sokka spent a day in the spirit world, and when he returned, all he could think of was getting to the bathroom. See more
When Zuko is seen rising from his bed, he is semitransparent. See more
[in a dream to Aang
Aang, it's time you learned my history with Fire Lord Sozin. You need to understand how the war began if you want to know how to end it. Meet me on my home island on the day of the Summer Solstice.
[talking in his sleep