->''"If we knew each other back then, do you think we could have been friends too?"''

Sokka suffers from an illness due to his exposure to the elements during the storm. When Katara begins to contract the illness as well, Aang goes to a nearby herbalist institute in hopes of finding a cure for his friends. On his way to collect the remedy the herbalist recommends, Aang is kidnapped by a group of Fire Nation Yuu Yan archers, commanded by the newly promoted Admiral Zhao. However, a masked marauder, the titular "Blue Spirit," rescues Aang from Zhao; the "Blue Spirit" is knocked unconscious during the escape, and Aang discovers that he is Prince Zuko. Aang offers him friendship, but departs when he is rebuffed.


* AbsurdlySharpBlade: The Blue Spirit cuts through the chains and shackles holding Aang with his swords.
* AbsurdlySpaciousSewer: The sewers at the fortress are huge, making it easy for the Blue Spirit and Aang to escape.
* ArrowCam: When the Blue Spirit is struck down by the Yu Yan archer.
* BackToBackBadasses: Aang and the Blue Spirit protect each others backs while mowing down dozens of enemy spearsmen and archers.
* BadassNormal:
** The Blue Spirit outfights and outwits quite a few firebenders while freeing Aang, with nothing but his swords and a bucket of water.
** The Yu-Yan Archers are a ridiculously skilled group of marksmen who are able to capture the Avatar alive, without a scratch on him.
* BecomingTheMask: Aang hoped that Zuko would have become this. [[SubvertedTrope It didn't quite work that way]].
* BittersweetEnding: Aang is rescued from Zhao and both Sokka and Katara get better but Aang's attempt to connect with Zuko and maybe even forge a friendship fails.
-->'''Sokka:''' Aang, how was your trip? Did you make any new friends?\\
'''Aang:''' No, I don't think I did.
* BlahBlahBlah: What Momo hears when Katara speaks to him.
* BroughtDownToBadass: The Blue Spirit is actually Zuko, who just isn't using his firebending to avoid revealing his identity.
* CeilingCling: The Blue Spirit does this to evade the guard inside the fortress.
* ChirpingCrickets: Done with a [[ItMakesSenseInContext defrosting frog]].
* CloudCuckoolander:
** Sokka's illness makes him more than a little loopy.
** The herbalist counts as well.
--->'''Aang:''' You're insane, aren't you?\\
'''Herbalist:''' That's riiiiiiight.
* ColdSniper: The Yu-Yan Archers: always silent, unfazed by pressure and emotion, with [[ImprobableAimingSkills legendary accuracy]] and extremely effective.
* CombatPragmatist: When Aang and the Blue Spirit are cornered, Zhao gives the order to his men to leave the avatar alive. Cue the Blue Spirit immediately holding his swords up to Aang's throat, effectively taking him hostage.
* ContinuityNod:
** Iroh playing the tsungi horn in front of the jewelled monkey statue, both bought in [[Recap/AvatarTheLastAirbenderTheWaterbendingScroll The Waterbending Scroll]].
** Both Sokka and Katara get sick after surviving [[Recap/AvatarTheLastAirbenderTheStorm the storm]].
* ContrivedCoincidence: Zhao receives word of his promotion to Admiral just as he's trying to recruit the Yu-Yan Archers, allowing him to make his request an order. How lucky can a guy get? Played with though, as there's no established reason why the original commanding officer of the archers should have outranked Zhao (though they may have been equally ranked). The writers could have given Zhao the authority from the beginning, simply by making the original CO someone lower ranked than Zhao. They created a contrived problem, and moments later presented a contrived solution.
* DramaticUnmask: Aang is shocked to see Zuko beneath the mask.
* EliteMooks: The Yu-Yan archers. They take down ''the Avatar'' with ridiculous ease.
%%* EnemyMine
* FacePalm: One of Iroh's opponents make this expression when he makes the move that he will win in a game of Pai Sho.
%%* FindTheCure
* IAteWhat: As their feverish delusions clear up, Sokka and Katara realize they're chewing on dethawing live frogs.
* InsultBackfire:
-->'''Aang:''' [[YoureInsane You're insane]], aren't you?\\
'''Herbalist:''' That's ''riiight''.
* LeftTheBackgroundMusicOn: The atmospheric background music as Zuko returns to his ship turns out to be Uncle Iroh playing the tsungi horn.
* {{Leitmotif}}: Zuko's tsungi horn theme first appears here.
* MoodWhiplash: After a very intense, full of action escape, we have a very quiet, melancholic and even sad scene with Aang reminiscing after a long gone friend he had, wondering if Zuko and him could've been friends in different circumstances.
* {{Multishot}}: During their training, a Yu-Yan Archers is shown shooting four arrows at once, each of them hitting the bulls eye of a different target.
* NewEraSpeech: Zhao gives one to a raving crowd.
-->"This is the year Sozen's comet returns to grant us its power! This is the year the Fire Nation breaks through the walls of Ba Sing Se, and burns the city to the ground."
* {{Ninja}}: The Blue Spirit.
* OhCrap: One poor group of Fire Nation soldiers sees Aang blast their companions off the next ladder, then look up to see him standing right over them.
* PinnedToTheWall: Aang is pinned down to a tree trunk by the archers' arrows.
* RainOfArrows: Going down on Aang.
* SaveTheVillain: Aang rescues an unconscious Zuko from Zhao's soldiers.
* SplittingTheArrow: While the Yu-Yan Archers are shown at a firing range, one of them splits an arrow, then splits that arrow, and finally the third arrow in succession, so each is embedded in the other.
* StabTheScorpion: It looks like the Blue Spirit is about to kill enchained Aang, but then it turns out he was using his swords to cut the chains and free him instead. Plays out as a PseudoCrisis.
* StartsStealthilyEndsLoudly: When the sneaky escape of the Blue Spirit and Aang is foiled, they have to start an open fight with the guards.
* TalkingYourWayOut: Aang tries this... unsuccessfully.
-->'''Aang:''' Untie me, and I'll fight you right now!\\
'''Zhao:''' Uh... no.
* TemptingFate: As a guard in a small lookout reads Aang's WantedPoster, he notes that the Avatar can create tornadoes and run faster than the wind. The other guard dismisses it as Fire Lord propaganda, right before seeing Aang zipping by a la Road Runner, knocking down the lookout.
* ThatsAnOrder: Zhao gets to do this when a messenger hawk arrives just after Colonel Shinu has denied his request to use the Yu-Yan Archers.
-->'''Zhao:''' News from Fire Lord Ozai... It appears I've been promoted to Admiral. My request is now an ''order''.
* TwoAliasesOneCharacter: The Blue Spirit is treated as an entirely new character until the unmasking scene.
* UndersideRide: How Zuko gets close to the fortress, getting inside the cart when the underside is checked.
* UnfamiliarCeiling: For Zuko as he awakes under a tree after being saved by Aang.
* VillainousRescue: Zuko kidnaps Aang from Zhao.
* WalkingSpoiler: It's next to impossible to refer to the episode or the Blue Spirit himself without mentioning Zuko.