-->"I am going to speak my mind and you are going to listen!"

Aang reveals to the others that the city has been evacuated, and they quickly conclude that the invasion is a trap. Even so, Sokka and Aang aren't willing to give up, and, surmising that the Fire Lord is still in the city, they decide to continue with the invasion. Aang, Sokka, and Toph head out to find the bunker the Fire Lord is hiding in, but are instead met by Azula. Meanwhile, Zuko confronts his father in another part of the bunker.

!!Tropes:
* BadassNormal: Azula is definitely this without her firebending.
** BroughtDownToBadass
* BerserkButton: Sokka loses it when Azula taunts him about Suki's capture. For context, he knew she was taunting everyone to get them to run out the clock and he still lost control.
* BerserkerTears: Sokka gets these when he loses it.
* BlatantLies: "I am a 400-foot tall purple platypus-bear with pink horns and silver wings."
* BroughtDownToNormal: The Firebenders.
* CallingTheOldManOut: Zuko to Ozai, while they're both depowered.
* ConsummateLiar: Azula. She even impresses LivingLieDetector Toph with the afore mentioned Blatant Lie.
* DarkestHour: Has the second cruelest DownerEnding of the entire series.
* DownerEnding: Mostly. The Invasion failed, the troops are imprisoned, and Aang and friends have to flee... but Zuko's good now!
* ElaborateUndergroundBase: The bunker beneath the Fire Nation capital.
* FieldPowerEffect: The solar eclipse stops firebending from working while the sun is completely blocked.
* HeelFaceTurn: Zuko ''finally'' makes one.
* {{Magitek}}: The tanks are propelled by bending and steered mechanically.
* MyDefenseNeedNotProtectMeForever: Azula stalls the heroes until her firebending returns.
* OffscreenMomentOfAwesome: Zuko goes to rescue Iroh from prison—and when he gets there, he finds out that Iroh has already busted out by himself, having turned into a "one-man army" and torn down the bars of his cell.
* OhCrap: First the war balloons appear...and ''then'' come the zeppelins.
* PetTheDog: One of the Fire Nation soldiers on guard in the prison brings Iroh extra food and treats him kindly. Because of this, he makes sure to tell her to take the day off on the day he's planning to break out and kill any soldiers who attempt to stop him.
* PunctuatedForEmphasis:
--> '''Sokka:''' Where?! Is?! Suki?!
* TotalEclipseOfThePlot
* WorldOfCardboardSpeech: Zuko telling his father that the Fire Nation has been terrorizing the world, that his scarring was ''not'' justified in any sense of the word, and that he will regain his own honor by joining the Avatar and helping him end the war.
* ZeppelinsFromAnotherWorld