This room is a true marvel, a mechanical wonder.
It's a planetarium that shows the heavens moving
Uh, this is beautiful, but how is it helpful?
Maybe these dials represent dates and times.
Sokka, try entering that date from that parchment you took.
Shh, Katara.
Not in front of the fox, he's with the owl.
[whimpering]
Wow. I gotta hand it to you, Sokka.
You picked the best mini- vacation for sure.
Hey, wait, what happened to the sun?
Great. You must have broken it.
It's not broken.
The sun is behind the moon. It's a solar eclipse!
It's literally the darkest day in Fire Nation history.
Now I get it. Something awful happened on that day.
I don't know what, but I do know why.
Firebenders lose their bending during a solar eclipse!
- Sorry. - That makes sense.
I mean, think of what the lunar eclipse
at the North Pole did to the waterbenders.
This is huge.
[whimpering]
Fine, you earned it.
[whimpering]
We've gotta get this information
to the Earth King at Ba Sing Se.
We'll wait for the next eclipse,
then we'll invade the Fire Nation
when they're totally helpless.
The Fire Lord is going down!
Mortals are so predictable and such terrible liars
You betrayed my trust.
From the beginning, you intended to misuse this knowledge
for evil purposes.
You don't understand.
If anyone's evil, it's the Fire Nation.
You saw what they did to your library.
They're destructive and dangerous.
We need this information.
You think you're the first person to believe
their war was justified?
Countless others before you have come here
seeking weapons or weaknesses or battle strategies.
Way had no choice.
Please, we're just desperate to protect the people we love.
And now I'm going to protect what
[whooshing]
What are you doing?
I'm taking my knowledge back.
No one will ever abuse it again.
He's sinking the building! We've gotta get out of here!
I'm afraid I can't allow that.
You already know too much.
[yelling]
[snarling]
I already
Library sinking.
Library sinking!
[grunting]
Hi-yah!
[grunting]
[panting]
[yelling]
Great Knowledge Spirit,
I beg you, do not destroy
your vast collection of priceless tomes!
[whooshing]
[yelling]
[grunting]
[shrieking]
We've gotta get back to the surface!
Sokka, let's go!
But we still don't know when the next eclipse is gonna happen.
Don't be stupid! We'll find out later!
No, we won't.
If we leave this place, we'll never get the information.
Aang, come with me to the planetarium, I need cover.
Katara, take Momo and
- get out of here! - But--
Go!
Hurry, Sokka!
[panting]
[growling]
[grunting]
[growling]
What is it now?
[whooshing]
[rumbling]
Who's there?
[growling]
Why are we doing this?
Because if this calendar to tell us about eclipses in the past,
then maybe it can project when the next one will be.
You can't possibly check every single date.
I don't have to. We just need to check every day
before Sozin's Comet arrives.
Because after that--
Well, try not to think about that.
[grinding]
Come on, eclipse.
That's it! The solar eclipse!
It's just a few months away.
Got it! Now, let's get to Ba Sing Se.
[grunting]
[roaring]
[grunting]
Don't make me put this down.
[whooshing]
[grunting]
[growling]
No! Stop sinking!
[grunting]
No!
I'm sorry, Appa.
[panting]
[thudding]
At least I'll have one specimen to add to my collection.
Your waterbending won't do you much good here.
I've studied Northern water style, Southern water style,
even Foggy Swamp style.
[grunting]
That's called Sokka style. Learn it
Wait! Professor, let's go.
I'm not leaving. I can't.
I've spent too long trying to find this place.
There's not another collection of knowledge like this on Earth.
I could spend an eternity in here.
Just go!
[sputtering]
[yelling]
[rumbling]
[grunting]
[rumbling]
We got it. There's a solar eclipse coming.
The Fire Nation's in trouble now!
Where's Appa?
[gasping]