ManySherlockfans probably still feel hungover from last weeks gut-wrenching premiere.

They shouldnt worry; the characters are, too.

Watson needs all the help he can get because he is not handling Marys death well.

Sherlock (series 4)

Credit: Ollie Upton

He doesnt sleep or wake up so much as lie down and get back up.

John says no ones heard from Sherlock the detective is apparently confining himself to his loft.

Perhaps thats because Sherlocks only friend in the world told him he would rather talk to anyone but him?

Im just asking questions.

After the credits, we get our first glimpse of episode villain Culverton Smith (Toby Jones).

Everyone seems to agree to this, even Culvertons daughter Faith, though she seems understandably creeped out.

Later, a drugged-out Faith tries to remember what her father said.

All she knows is he said he had a problem, one he could only solve by killing someone.

That was three years ago.

In the present, Faith visits Sherlocks loft to tell him the story and beg for his help.

Hes also not quite the Sherlock we all know and love.

Nevertheless, he still finds a connection with Faith.

Mycroft says he gets regular updates about Sherrinford and the third Holmes is secure, whatever that means.

Except most names arent just one word.

So, what did Culverton really say?

Thats what has Sherlocks attention.

Its the same memory that popped up when Mary drugged him last week.

For someone who does a lot of drugs, Sherlock sure seems to have some powerful repressed memories.

A strange, possibly volcanic combo.

Does this memory have something to do with the third sibling?

The more he thinks about it, the more realizes the one word Culverton said must have been anyone.

What if you were a rich person with resources and had that same urge to kill?

Most serial killers seem like theyre making the most with what they have.

They find none other than Mrs. Hudson climbing out of the bright red sports car.

Mrs. Hudson asks John to examine Sherlock as a doctor, if nothing else, and John reluctantly agrees.

Mrs. Hudson then opens the trunk of her car, revealing a handcuffed Sherlock.

It gets even funnier when Watson demands Sherlock be medically examined by Molly, too.

Sherlock, predictably, is not as interested in his own health so much as the Culverton Smith case.

Just then, Culverton sends a driver to pick up John and Sherlock to meet him for lunch.

In fact, hes already turned the serial killer accusation into a new commercial for cereal.

Culverton then takes Sherlock and John to a hospital he supports and brings them to the childrens wing.

Thats why John writes the stories, after all.

Afterward, Culverton offers to take Sherlock and John to his favorite room in the hospital.

Culvertons favorite room in the hospital turns out to be the mortuary.

And thats when things really go south.

This Faith has no memory of meeting Sherlock and is actually a completely different person.

He grabs a nearby scalpel and lunges at Culverton, only to get beaten down by John.

NEXT: Miss me?

Instead, hes giving him top-notch care in the hospital.

as a parting gift.

Thats nothing compared to what Mrs. Hudson has to say, though.

This episode might actually be one of the best Mrs. Hudson showcases in all ofSherlock.

Having previously defended her fancy car to John by saying Oh, kindly.

Contrary to popular perception, she says, Sherlock is not all about thinking and rationality.

He gets emotional, he lashes out, he shoots the wall.

And when he cant figure something out, he stabs it.

Johns eyes follow to the most recently stabbed thing in the apartment: Marys Miss me?

Mrs. Hudson demands the government spooks leave so her friend can watch a video from his departed wife.

She saves the best for Mycroft: Get out of my house, you reptile.

Perfect timing, because back at the hospital, Sherlock could really use some help.

This is his Murder Castle, done right.

The bad guy has been caught and Sherlock and John are working together again.

Well, kind of.

Talking about the case at Baker Street later, Sherlock and John are clearly still awkward.

After some crying, he and Sherlock hug it out.

The pain of Marys death will never truly go away.

It is what it is.

Well, maybe Sherlock told her.

After all, they did spend a night together.

Thats right, shes the fake Faith!

And thatsstillnot even the end.

When John asks for her name, she reveals shes called Euros, after the East Wind.

Strange name, but her parents did love weird names like that Sherlock, for instance, and Mycroft.

Thats right, the Holmeses didnt have a third brother; they had asister.

And it was never Moriarty after all.

And Toby Jones was fantastic as Culverton Smith, supremely creepy and slimy.