After we see the bison fountain we see the ceiling with pipes and a metal object with a tower like top in the bottom right corner of the screen; but after we see Aang's confused expression and we return to the same shot, the metal object is replaced with a wheel.
The Northern Air Temple was discovered by people walking up on foot; also, the Fire Nation army easily marched an entire unit up the walkways in order to get to the Northern Air Temple. But, earlier Aang says how the only way to reach a temple is through bisons.
As in The Southern Air Temple when Aang goes to open the sanctuary doors, the locks are in "open" position. when he performs the airbending, they are in "locked" position until he opens them.
While Katara asks how they can stop the incoming Fire Nation attack, her braid is missing.
While the Mechanist tries to plea his case and puts out the model blimp's fire, Aang's yellow collar turns orange-red like his shawl.
When Katara first flies on a glider, Teo flies in the sky with her. But a few moments later, Aang is with her, and Teo is on the ground, his glider attachment next to him.
Teo said only an airbender can open the door to the Northern Air Temple sanctuary, and this is the second time we have been told this (also at the Southern Air Temple). But, somehow, the crazy inventor was able to get into and out of the area many times, without possessing airbending abilities.
Aang: Our gliders.
The Mechanist: Yes, little light flying machines. They gave me an idea. Build a new life for my son, in the air! Then everyone would be on equal ground, so to speak! We're just in the process of improving upon what's already here and after all, isn't that what nature does?
Sokka: Aang, you were right about air power. (Pointing to the sky) As long as we've got the skies, we'll have the Fire Nation on the run!
Aang: You know what? I'm really glad you guys all live here now. It's like the hermit crab, maybe you weren't born here, but you found this empty shell and made it your home. And now you protect each other.
Teo: That means a lot coming from you.
Aang: This place is unbelievable.
Teo: Yeh, it's great isn't it?
Aang: No, just unbelievable.
Storyteller: So travelers, the next time you think you hear a strange large bird talking, take a closer look, it might not be a giant parrot, but a flying man! A member of a secret group of air walkers who laugh at gravity and laugh at those bound to the earth by it!
Mechanist (after knocking down a wall which contained on the other side of it a sacred statue of an airbender): What the doodle! Don't you know enough to stay away from construction sites? We have to make room for the bathhouse.
Aang (extremely angered): Do you know what you did? You just destroyed something sacred! For a stupid bathhouse!
Mechanist: Well, people around here are starting to stink.
Aang: This whole place stinks!
Sokka: We better find some solid ground before it finds us!
Aang: Just remember to keep your mouth closed so you don't swallow a bug!
(Later in the episode)
Katara: Wait, how do you land this thing? (Katara begins to cough) Bug! That was a bug!
Aang (looking into Northern Air Temple sanctuary): This is a nightmare.
Mechanist: You don't understand.
Aang: You're making weapons for the fire nation.
Sokka: ... so then the question became, how do you keep a lid on hot air?
Katara (whispering): Awww, if we only knew. (Aang, Katara and Teo begin to laugh)
Aang: The deal's off.
Fire Nation Emissary: The Avatar.
Mechanist: Aang, don't get involved.
Fire Nation Emissary: If I don't get what I came for, the Fire Nation will burn this place to rubble!
Aang: Get out of here! You're leaving empty-handed.
Fire Nation Emissary: Then the destruction of this temple will be on your head.
Mechanist: We finally got the war balloon working, thanks to Sokka. That boy's a genius!
Sokka: Thank you. You're a genius.
Mechanist: Thank you. (Aang and Katara give each other weird looks)
Sokka: Why would you want to use fireflies for light?
Mechanist: Hey close that up, they'll get loose! Fireflies are a non-flamable light source.
Teo: Besides, there's one part of the temple that hasn't changed at all.
Katara (walking in a new hallway with air nomad symbols on the floor, approaching a door): Hey! It's just like the one in the other Air Temple.
Teo: Only an airbender can open it, so inside it's completely untouched, just the way the monks left it. I've always wondered what it's like in there.
Aang: I'm sorry, this is the last part of temple that the same as it was. I want it to stay that way.
Teo: Hey Aang, I want to show you something.
Aang: I just can't get over it. There's not a single thing that's the same.
Teo: I don't know about that. (picks up an insect-like creature) The Temple might be different, but the creatures that live here are probably direct descendants of the ones that lived here a long time ago.
Katara (takes creature from Teo): You're right. They're kind of keepers of the temple's origins. (gives creature to Aang)
Mechanist (looks over to three lit candles): Look at the time (looks over to his construction crew) Come, the pully system must be oiled before dark.
Sokka: Wait, how can you tell the time from that thing? The notches all look the same.
Mechanist: The candle will tell us.
Sokka (the top candle sparks four times): You put spark powder in the candles.
Mechanist: Four flashes, so its four hours past mid-day. Or as I call it 4 o'candle.
Mechanist: If you like that, wait till you see my finger-safe knife sharpener. Only took me three tries to get it right. (pulls 3 wooden fingers off his hand, throws them to Sokka)
Aang (looking at a very different temple than the one he visited 100 years ago): This is supposed to be the history of my people.
Katara: I'm sure some parts of the temple are still the same.
Katara (inside the temple, looking at all the pipes, etc. that now vacate the temple): Aang used to come here a long time ago. I think he's shocked it's so different.
Sokka: So better!
Teo: Hey, you're a real airbender. You must be the Avatar! That's amazing! I, I've heard stories about you...
Teo: Hey there. You're pretty good.
Aang: Yeah, I know, but I can do more than fancy gliding. (Aang proceeds to do airbending tricks, and succeeds)
Katara: They really are airbenders!
Aang: No, they're not.
Sokka: What do you mean they're not? Those guys are flying!
Aang: Gliding, maybe, but not flying. You can tell by the way they move, they're not airbenders. Those people have no spirit.
Katara (as they are approaching the Northern Air Temple): Do you think we'll really find airbenders?
Sokka: You want me to be like you, or totally honest?
Katara: Are you saying I'm a liar?
Sokka: I'm saying you're an optimist, same thing basically.
Storyteller: Jingle jingle. (holds bag for money, waiting for Sokka to put some money in)
Sokka (reaches into pockets searching for some coins, but only finds a bug and some dirt) Sorry...
Aang: Aren't airbender stories the best?
Katara: Was it realistic? Was that how it was back then?
Aang: I laugh at gravity all the time. (laughs) Gravity.
Fire Nation Emissary: This defeat is the gateway to many victories.
This episode was published in book format in Avatar The Last Airbender: The Lost Scrolls - Air.
Character Debuts: The Mechanist, Teo, War Minister Qin
This episode aired in the UK on October 14, 2006).
This episode is in the Avatar: The Last Airbender Book 1: Water, Volume 5 DVD, along with The Waterbending Master, and The Siege of the North Parts 1 and 2.
Towards the end of the episode, the mechanist is seen bowing his head a good distance away from everyone, the picture suddenly turns black and white.
Katara and Sokka wear their coats again in this episode; this makes sense since they are closer to the North Pole.
This episode was previously called The Gliders.
The gliding used by the non airbenders resembles a popular activity called Hang Gliding.
Considering his flying ability, Teo's name is likely a variation of the Mandarin word 'tiao' which translates to 'cicada'.
The tanks in this episode seem ed after the Ford M1918 tank that was produced for the U.S. Army in World War I.
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