So there were three of us.

I know that now.

You, me and...

Eurus.

A sister i can't remember.

The memory are disturbing.

Why don't I remember her?

You do remember her, in a way.

Every choice you've ever made, every path you've ever taken,

the man you're today

is your memory of Eurus.

Eurus, I don' remember you at all.

Interesting.

Redbeard!!

Mycroft told me you'd rewritten your memories.

He didn't tell me you'd written me out completely.

What do you mean, "rewritten"?

You still don't know about Redbeard, do you?

Hello, Redbeard, here, came on.

It's going to be such a good day.

Redbeard was my dog.

I know what happened to Redbeard.

Oh Sherlock,

you know nothing.

Welcome to the final problem.

Bang! Dead!

You can't do it, Sherlock. It has to be your brother...

John

... or your friend.

Tic Toc Tic Toc Tic Toc

Remember me.

No!!

Treats?

I'm your Christmas present.

In exchange for?

She is very clever.

I'm beginning to think you're not.

Problem, someone is about to die.

You didn't win.

You lost.

Choose one and kill the other.

Put this stupid little man out of all our misery.

Shoot him.

He's trying to make it easy for me to kill him.

Oh Sherlock.

Which is why this is going to be much harder.

Goodbye brother mine.

And here we are, the end of the line.

Holmes killing Holmes.

It took her just five minutes to do all of this to us.

Well, not on my watch.

Ten

Nine

Eight

Seven

You don't know about Redbeard yet.

Six

Sherlock!

Five

Sherlock, stop that at once!

First find Redbeard.

I'm letting the water in now.

You don't want me to drown another one of your pet, do you?

I am the final problem.

The bones I found...

You were upset, so you told yourself a better story.

...they are not dog's bones.

We never had a dog.

He was Redbeard.

You killed him.

Deep waters, Sherlock.

All your life,

in all your dreams.

You killed my best friend.

I never had a best friend.

Save my soul.

Seek my room.

I'm your brother.

I'm here, Eurus.

I'm lost and no one can hear me.

You're not lost any more.

Help me save John Watson.

You ok?

I said I'd bring her home.

I can't, can I?

Well, you gave her what she was looking for.

Context.

Is that good?

It's not good, it's not bad. It's...

It is what it is.