>> How can they not be Trillers?

That doesn't make any sense.

>> Everyone is seeing them.

They have to be Trillers.

>> I don't know.

But I can tell from looking at the information on this map something's not right.

Like Penguia.

>> Let's check it out.

>> Look how many Trillers are here.

One, two, three, four, five, six.

Trillers hate the cold weather.

>> That is strange, I guess.

>> Another thing -- Trillers usually travel in pairs.

Aside from this bunch in Penguia, most of them were spotted alone.

>> So how can we know for sure if they're Trillers or not?

>> Ah!

A couple of kids sent in pictures of the ones they saw!

See anything weird?

>> They look like Trillers to me.

>> Something's not right.

Zoom in closer, Jax.

Hmm, wait!

Look at its toes!

There!

See?

>> What?

I see two toes.

>> Trillers have three toes!

>> I'll bring up the other pictures.

>> Yikes!

They all have two toes!

>> These don't even look like real birds!

>> Guys, if these Trillers are fake, where are the real ones?

>> What's taking so long?!

[ Both grunting ] >> Sorry, boss.

It's not easy finding purple berries in the Northern Frontier.

>> But we got some nice juicy ones.

Isn't it adorable when they eat?

>> Adorable.

Now, it's time to sing.

Sing, Trillers.

Sing!

>> They're not singing, boss.

>> I can see that!

Think of another idea!

>> I have nothing.

>> Me neither.

>> Well, keep thinking.

My robotic Trillers can't fly around forever!

>> Fake Trillers?

All of them?

>> We're pretty sure, Professor.

>> Well, according to the data we've gathered, they're not behaving like real Trillers.

>> And the fact that they only have two toes proves they're fake.

>> But about the real Trillers?

Where are they?

If something has altered their migratory pattern, there could be serious ornithological consequences.

>> Can you say that a simpler way?

>> We need to find the real Trillers now.

>> Okay, boss.

We got some squeaky toys, a ladder -- Hey!

Where's the bird swing?

>> [ Laughing ] Whee!

>> DeeDee, get out of there!

>> What?

You know I love swings!

>> Yeah, but it's not for you!

[ Toys squeaking ] >> Enough fun!

Sing!

Ah!

>> Maybe they need some sun, boss.

>> Yeah, they haven't been outside in a while.

[ Computer beeps ] Oh!

Gah!

Uh, boss?

What does this thingy do?

>> It calls the robotic birds back to the Northern Frontier.

Why?

Oh, uh, no reason.

Mnh.

[ Beeping ] ♪♪ >> Hey, Slider.

What's up?

>> Hey, Inez.

So, there were a bunch of Trillers here on Radopolis, but suddenly, they all flocked together and flew away!

It was kind of bizarre.

[ Cellphone ringing ] >> Hello?

Fluff?

Really?

They left Penguia, too.

>> And Sensible Flats.

>> Any way we can track where the fake Trillers are going?

>> Attention, citizen scientists.

Once again, we need your help.

We've discovered that the Teal-Footed Trillers are imposters.

We need your help to track where they're going.

If they pass over your site, please report their location immediately.

Your help is greatly appreciated.

>> Lots of Triller sightings coming in.

>> They're all over the place.

>> Keep watching.

Usually a pattern will emerge.

>> Refreshing the data.

>> Look!

It's like they're all coming together!

>> Keep watching.

>> Refreshing again.

>> It looks like they're heading north.

Way north!

>> There's only one Cyber site that far north.

>> The Northern Frontier!

>> Hacker!

[ Beeping ] >> Mother B, we need a portal, now!

>> I've tried everything!

Why won't you sing?!

Why?!

[ Crying ] Why?!

[ Trillers singing ] [ Gasps ] It's happening!

The book is opening!

>> Hey!

>> Freeze, Hacker!

>> What are you Earth brats doing here?

Stay back!

You're ruining my plan!

>> Release the Trillers!

The real ones.

>> Not a chance!

Keep singing.

>> We'll never release them!

>> And don't bother trying yourself because we have the key!

Ooh!

>> Hey!

>> Not anymore!

>> Uh-oh!

>> Get the key!

>> Hey!

[ Both grunting ] ♪♪ >> [ Gasps ] No!

My chance at Cyber domination gone!

>> [ Gasps ] The Secrets of Cyberspace!

How did you get this?!

>> Oh, we stole it from the Puzzle Pyramid.

>> Hey!

>> Yeah, we were with him.

>> Quiet!

>> I'm putting this in a safe place where it belongs.

>> Shoo!

Get lost!

[ All grunting, screams ] [ Thud! ]

[ All groan ] [ Creak, slam! ]

>> This is unacceptable!

>> Let us out of here!

[ Beeping ] >> Professor, call everyone back to the Cliffs!

The Trillers are on their way!

>> Welcome back to the Migration Celebration!

[ Cheering ] I want to thank all of our citizen scientists.

Without your help, we would never have found the Trillers!

I also want to thank the Cyber Squad, and especially Digit, whose Triller expertise helped save the day.

[ Gasps ] The Teal-Footed Trillers have arrived!

[ Trillers singing ] >> I've never seen anything like it!

>> Me either.

>> Awesome!

>> I told you it was spectacular.