Thats where this weeks victim comes from.

The cops cant, but Visily can.

Beckett sends Castle out on babysitting duty to keep the gregarious Russian out of her hair.

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Credit: Nicole Wilder/ABC

A few light threats about waking up footless in Ibiza, and hes singing like a bird.

Hed dropped Grigory off at that building but didnt know why he wanted to go there.

Grigory had recently spent a few nights in a bed and breakfast near the site of the accident.

Via Skype, the proprietor says that Anya, his mother, would stay there often with a boyfriend.

Clearly, Grigory wasnt at all convinced that his mothers death was any kind of accident.

A crime of passion then?

(Sort of a reverse Caskett, then.)

One of those agents is Anyas boyfriend, Anatoly, a.k.a.

Frank Thomas, and the other is Anya herself.

But Visily doesnt lose his cheeriness when he drops his cover.

Castle begs to be allowed sixty seconds to use another method to get Anatoly to talk.

That party Jurgen wanted to attend?

Models arent the main event; a possible assassination is.

Visily shows up to the reception with Caskett and Rysposito in tow.

), so the detectives case the place as best they can.

Rita drops by to see what she can pull from her old espionage colleague Visily.

(You mean the place with the guy?

Id watch a spin-off of their adventures.)

Anya was hot on the traitors tail when her mysterious accident occurred.

Castle and Beckett stand outside the interrogation room, watching Rita work.

Its disconcerting to see Beckett smile at that, even though her motivations are only to protect her husband.

He and Rita share a moment, and hes boosted a bit by her compassion.

She did it out of love, Rita says.

No, I know, Castle replies.

And at the end of the day shes worth it.

She leaves him with a hug and a message of pride from his dad.

I dont believe for one second that Rita can keep her own promise never to see Castle again.

Shes too wrapped up in their lives.

Castles frustration over the lies and half-truths wrought by the LokSat investigation gets Becketts gears turning.

Theyre old, and so is the sniper rifle that shot (but didnt kill) Sergei.

It was Sergei who killed Grigory when Grigory became suspicious.

There was no love there, Anya tells Beckett.

Grigory wasnt his biological son, but he sealed his fate when he became an obstacle.

Sergei gloats to Castle and Beckett about returning home unscathed.

Visily and Pavel have other plans.

Visily worked out the ending to his Nikki Heat novel, he says.

In Russia, there are far worse places than prison, he announces with another grin.

Hope Sergei packed his fur coat.

And a nice handle of Russian vodka.