The team deduces that Mandy had a partner. They’ll have to figure out who it is without our favorite mystery writer, as he has a date with a hot reporter. Castle does his best fight off Kristina Coterra’s attempts to seduce him at his apartment. He’s no match for this wanton woman as she straddles him on his couch in her bikini. Beckett bursts into the place believing her partner is in trouble. Castle tries to soften the shocked look on Beckett’s face by letting her know that he knows who the killer is.
Beckett can’t seem to shake the image of another woman’s bikini-clad cleavage being shoved into Castle’s face. The fact that he figured out who the killer is seems totally secondary. Still, they head down to the station to arrest Miles Haxton. Kristina told Castle that she couldn’t bikini-seduce him in the past because he’s gay. He killed Mandy because she wanted to expose the story they’d been working on to save the kids, but this would take place before he could get credit for the exclusive. Case closed.
Back at the station, things are awkward between Castle and Beckett. All is better with our other favorite partners though once Esposito realizes that Ryan took a punch for him during the Reggie Blake brouhaha. As for Castle, he apologizes to Beckett. They ultimately agree to talk about dating other people without “actually” doing so to keep their secret. Of course, Beckett still has to get rid of that image of Kristina’s breasts in Castle’s face, which reveals a devilish smirk when she says this.