Trick-or-treaters.

Trick-or-treat!

Okay, let's see.

What do we have here?

Class dunce with a fake scar, and you must be the princess of Meatland.

And...

oh, upset rooster head.

And what are you supposed to be?

A kid in a sheet?

A platypus in a sheet?

Hey!

A platypus in a sheet?

Well, that's perfect.

Wait, wait, I was hoping you'd...

Oh, whoa, whoa, whoa, whoa.

I'm being sincere.

There's no trap, no innate, or just...

Come over here.

You've got to see this.

It was delivered today.

I had to sign for it and everything.

It's a real castle with a moat.

Who delivers a moat?

How do they even get that on a plane?

It's from my great-aunt Henrietta Hockenschmidt.

She left it to me in her will.

Lookit, listen to this.

To Heinz Doofenshmirtz, you are my only nephew, except for Roger, and I hated him.

See?

See why I liked her?

Therefore, I leave you my castle, and hidden inside is a very large treasure.

Huh?

And look, there's a little treasure map with clues.

Want to help me?

Oh, come on, it'll be fun.

Take off your secret agent hat just for tonight and put on your adventure hat.

That's my guy!

Treasure haul!

This is gonna be fun.

Welcome to my castle party.

Here's a mask.

Lacy, wow!

Great costume.

This is a costume party?

Sir Grand of the goth table has arrived.

You look great, Sir Grand.

Goth dragons beware.

Vanessa?

Candace!

Whoops!

I guess your party's gonna have two vampire queens.

What are the chances, right?

I'm gonna go change.

How did you ever pull this off?

Well, my dad gave me permission to use his castle, and then all I had to do was call the best party planners in town.

Ferb, you get the 440 junction box hooked up behind the riser, and I'll go check up on the pumpkin crudités.

8-2, Vanessa.

I had to.

This is a big night for me.

My boyfriend's coming.

Oh!

Here he is right now.

Ooh, a vampire.

It's a good thing I have my neck covered.

You're not my boyfriend.

Whoops!

Sorry, I thought you were my...

Jeremy, it's me, Candace!

Ooh, a vampire.

It's a good thing I have...

Yeah, heard you the first time.

All right, the first clue is in the letter.

Let's see here.

My treasure awaits you.

Keep on the trail.

A ride up the stairs from under a veil.

What kind of twisted gibberish is this?

That's it!

Henrietta's chairlift!

Oh, yeah.

You can sit here, Perry the Platypus.

No?

All right, suit yourself.

We're coming for your treasure, Henrietta!

Aah!

Ha!

I got it!

Ow!

They ship the alligator, too?

Get away from me, Susan!

We talked about this.

These scallop cheese slices should be staged directly across from the crackers.

But overall, nice work.

Hey, look at you.

You're Isabella Rella.

If I lose a slipper tonight, you know where to find me.

Oh, that reminds me.

There's some water on the floor over by the sally port.

Buford, it is so hot in here.

Can I please have some punch?

You don't want to drink that.

You know, I think we have the best castle party costume.

Hey, Buford, look at me.

I'm a castle at a castle party.

Get it?

Huh?

Huh?

Yeah.

Hey, Windsor, your drawbridge is down.

Oh, my.

How embarrassing.

Monty should have been here by now.

Finally.

Wait, who are you?

I'm the Scarlet Pimpernel.

As am I.

Same here.

Hey, what's going...

Oh, for crying out loud.

Okay, Ferb, let's kick this biggest, baddest, halloweeniest bash into high gear.

Yeah!

We got squirrels in our pants.

Look at them, they're stomping their feet.

Look, look at them, they're stomping their feet.

Look at them, they're stomping their feet.

Stomping their feet.

Stomping their, stomping their, stomping their...

It's a spa day.

Yeah.

Shiatsu.

Thank you very much.

We got a soft grub of butter.

What's it gonna be?

A foot bath, a facial, aromatherapy.

It's a spa day.

Yeah.

We got squirrels in our pants.

We got squirrels in our pants.

I'm Lindana and I wanna, wanna, wanna have fun.

We got, we got, we got squirrels in our pants.