Otherwise, what are we even doing here?

(A fresh mystery: With Mary dead, who cooked the extravagant multi-course meal on Kreizlers table?)

Sarah visits Kreizler and urges him to confront his demons, revealing her own at the same time.

THE ALIENISTEpisode 110CASTLE IN THE SKYLuke EvansPhoto by Kata Vermes/TNT

Credit: Kata Vermes/TNT

Not only that, the poor girl had to help him finish the job.

We held the gun together, she says.

She doesnt mention it, but were sure gonna, because WOW.

Get it, Sarah!

You deserve this!)

jar of pickled eyeballs) in search of clues as to his whereabouts.

Or rather, Moore and Kreizler presume.

A Night at the Opera

So, the thing about the opera?

Its actually a necessary act of subterfuge, because the alienist is being stalked.

Hes been so, so good.)

The two find and confront Beecham, whos on the verge of doing somethingveryuntoward to Joseph.

Japheth, says Kreizler, using Beechams birth name and prompting an uncontrollable bout of facial twitching.

It seems like a good start!

he says, cackling.

From here, everything happens very fast: Kreizler and Beecham grapple, and a shot rings out.

This is when Sarah shows up, carrying a little tiny purse.

There had better be a gun in there.

But Beecham isnt saying.

Instead, he dies, leaving behind a trail of bodies and a host of unanswered questions.

After all, they stopped a monster!

Youre in love with what you dont have, she tells him, then whistles up a cab.

And as for the alienist, he walks alone into a garden, where his own past awaits.

But thats okay: Kreizler is here not to get satisfaction, but to ruminate, and bestow forgiveness.

You did the best you could, he tells his father, and departs.

All told, this finale highlights the challenges of pulling off a limited series with a not-so-limited cast.