Castle closes in on Beckett’s mission – can their marriage survive the secrets?

The victim would have been involved in a star-crossed relationship with another passenger below her station.

The motive would have been a priceless jewel reminiscent of Roses Heart of the Ocean.

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Credit: Mitch Haaseth/ABC

Ryan and Esposito would have gone undercover as first-class valets.

And Castle and Beckett would have really recreated that iconic sweaty car scene instead of just talking about it.

But theres notimefor the full-scale James Cameron treatment in the shows midseason finale.

Our body this week is a floater.

The detectives dont know immediately what to make of it.

Beckett boards theBentlyand is met by a fake smile and a brick wall.

She tries to be exasperated; he turns on the charm business as usual.

Until the boat starts moving.

Undeterred, Castle and Beckett divide and conquer.

Hes already some rich guy, right?

How hard could it be to impersonate passenger Dave Shermer for a few minutes?

(I was a professional square dancer.

A lot less cardio.)

Castle asks to look through her things.

Meanwhile, Beckett is interviewing the three Marthas whod been pointed out to her earlier on the Lido deck.

Shed seem distracted on their last sail, the women tell Beckett.

They know nothing about Laura and drugs, but secret partier Elaine knows where she getsherpot supply.

Castle and Beckett case the area together, though the jumpy crew already wiped it clean.

They couldnt wipe down the hull though, which is where Beckett spots some of Lauras blood.

A black light reveals more residue on the deck.

Its a shady cover story, since cruise line dancer isnt known for being a lucrative gig.

He runs, Beckett gives chase, and hes inevitably caught and arrested for Lauras murder.

And so ends the at-sea portion of thisCastleepisode.

Last week, his post-coital bliss was interrupted by the mysterious text he saw on Becketts phone.

(You may just have crossed a line you cannot uncross.)

He just wanted her out of Castles bed.

Hes arrogant and shrewd in his conversation with Beckett.

Deals run both ways, Beckett reminds him.

Brown wins this round and seems awfully pleased with himself.

Castle is called out of the precinct by Hayley, whos been able to trace the infamous text.

The text was sent by Vikram through several proxy servers, Hayley explains.

Its a system that he and Beckett created to safeguard their communications.

What if Kate brought him in to secretly investigate those murders?

Its a distressing scene.

Castle calls Beckett so that Hayley can lock into her signal.

He does so under the pretense of an invitation for sex, which is off-the-charts, ethically speaking.

Its a good thing Martha left after Castle declined to take her advice to leave Becketts secrets alone.

Even a mother would have a hard time forgiving this kind of trespass.

Hayley is one firewall away from all-access.

Vikram receives a 10-4 from Beckett to fry Castles system, since she knows he has a back-up.

The damage has been done to more than just a computer server.

I hope I didnt just nuke my marriage, Beckett sighs.

The drugs that docked in New York withBentlyare being moved by trash dumping vehicles.

Finally, they have the talk thats been put off unnecessarily for the whole front half of this season.

Beyond the reality of Lockset (is this the first time Beckett refers to Lockset as a person?

Beckett wants blind trust; Castle wants brutal honesty.

Both are valid points, but Castle sees the detachment behind Becketts vow to protect him.

Hes not angry, just resigned.

Beckett gets Longarzos whereabouts, then Castle sends her off to another battle.

You have a job to do, and theres no one better.

Beckett, Ryan, and Esposito hunt down Longarzo, who escapes from his apartment into a back alley.

Cornered, he pulls a gun on them, and Ryan and Esposito open fire.

He pled down Accosta to take the cops focus away from the drug running.

Back at his apartment, Castle is having a heart-to-heart with his platonicHerfantasy, Lucy.

Thats because Im in love, he says.

Breathe with me, everybody.

Everything is going to be alright.