but is there something shady behind Miss Shell's shades?

Hey granny, what's shaking?

This is Bikini Bottom Mysteries.

Meet Miss Shell.

Miss Shell sasses ghosts.

There's this great new product called toothpaste.

Miss Shell shushes trouble makers.

Miss Shell sells sea shells down by the sea shore.

Oh, she doesn't?

Well, she still seems like quite a plucky old lady.

But is there more to Miss Shell than meets the eye?

Loni, is that you?

Exhibit A: seeing double.

Decades after her stint as a teacher,

how is this old lady still so spry?

Is it all the power walking?

The steady diet of Krabby Patties?

Or is it something far stranger?

Watch closely.

This Miss Shell is slumping into her vichyssoise.

While that Miss Shell sprints through the streets of Bikini Bottom.

This Miss Shell needs a walker.

While that Miss Shell can withstand a towering boat wreck.

This Miss Shell can't find the menu section.

Do you know where the menu section is?

While that Miss Shell faced down the Flying Dutchman himself.

Seems awfully suspicious.

Radically different personalities? Rapidly changing abilities?

Could it be that there's more than one Miss Shell?

Holy smokes!

Holy smokes is right.

Because where there's smoke, there's fire.

That's right. It seems Bikini Bottom is home to not one,

but two Miss Shells.

One elderly fragile and hopelessly gullible.

But this is a spoon.

And the other a fiery fish with a pension for stunts.

Thank you SpongeBob!

Oh, you're--

Still not convinced?

After all, it's an excellent likeness nearly indistinguishable,

except we've caught the double on camera.

Take a look. This Miss Shell flees from danger.

But moments later, back in the nursing home.

Take a look at those boots.

Seem familiar?

Those are Miss Shell's signature boots.

That's right. The other Miss Shell is still inside.

Or half inside.

But if there are two Miss Shells

with radically different stunt abilities,

wouldn't someone notice?

What if someone already has?

Exhibit B: cold shoulder.

Between the hair, the glasses and the attitude...

I knew it.

Miss Shell seems pretty memorable.

And she and SpongeBob cross paths again and again.

They were in a band together.

They learned to drive together.

And she was SpongeBob's kindergarten teacher.

That's right, she was there in his formative years

ushering him through kindergarten.

So why doesn't her old student recognize her?

They're right here, lady.

Lady?

He's got nothing to say to his old teacher?

He doesn't even say her name?

Hey granny, what's shaking?

Granny? This is the same sponge who was willing to break his

other teacher out of jail.

The same sponge who counts his kindergarten classmates

as among his closest friends.

Only our closest friends.

Who the barnacles is SpongeBob Squarepants?

I believe you went to kindergarten with him, dear.

So why the cold shoulder for Miss Shell?

Was it because she shushed him while he was feeling it?

- Are you feeling it now, Mr. Krabs? - Shh!

Is it because she quit Squidward's marching band

before the Bubble Bowl?

Or is it because SpongeBob Squarepants, the chronic teacher's pet,

is the only one who sees that this isn't the real Miss Shell?

But why cook up a ploy so cunning?

So elaborately choreographed, so intricately plotted,

that we never see them in the same place.

Is it for sinister purposes or for something far more personal?

Exhibit C: Dennis the Menace.

Miss Shell's scheme might have selfish or shellfish ends.

See what I did there?

Could she be trying to bust her long, long, long-time boyfriend?

Because it seems Dennis is the real menace here.

Sure, Miss Shell and Dennis have a long running relationship.

They play canasta together.

They go out on the town together.

I don't do it on purpose.

But this is no happily married couple.

It's all in the name,

Miss Shell, not Mrs...

Whatever Dennis' last name is.

And it looks like Miss Shell is still looking for a ring.

She's been seen leaping for the bride's bouquet at a wedding.

But good luck with those wedding bells, Miss Shell,

because Dennis is already married.

Just like we raised him.

It seems Miss Shell has her suspicions.

You have been cheated and lied to!

I knew it.

And rightly so, because when leading on Miss Shell,

and maintaining a marriage with Mable,

Dennis has been dining with other ladies.

Dennis, you double crossing cad.

So is Miss Shell's double act a way to spy on her no-good boyfriend?

A plot to catch out Dennis?

We may never untangle the personal lives of

these scandalous seniors, but one thing's for sure.

Don't cross Miss Shell.

And now, a Bikini Bottom Bonus Mystery.

Janet and Marty are two suspicious starfishes.

They claim they don't have kids.

We don't have a son.

These two starfish claim Patrick is their son.

But if that's true, then how did Janet and Marty

know Patrick's name?

Pats for Patrick!

Was it a good guess? Are they smarter than they seem?

Are they stalking Patrick Star?

Who are you people?

File this one under M for Marty I'm scared.

Have you seen something strange under the sea?

Leave us a comment and tune in next time

for more investigations that will blow your pores,

strip your scales and flip your fins.

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if the pineapple fits, live in it.