Georgia

Phoebe Bridgers

Alexis says goodbye to Hayley; Beckett and Rita discuss Allison Hyde's connection to Loksat.

Shots Go Off

Cypress Hill & Rusko

Ryan and Esposito go undercover as college students in an attempt to talk to suspect Scott.

Happy Song

Bring Me The Horizon

Alexis goes to a party to talk with Scott's fraternity brothers; Castle tells Ryan and Esposito he's going to get Beckett back; Castle crashes the frat party.

Into You

Low

Mia tells Castle that Beckett still loves him; Beckett collects her stuff from the apartment.

Cool (from West Side Story)

Cast

Castle and Slaughter break into song before fighting the bad guys.

Baby Please

WE ARE TWIN

After being drawn outside by his dog's barking, a man spots a body floating next to his boat.

The Things We Do For Love

Cast

Martha rehearses a performance as a body is discovered in the artificial snow box.

Castle and Alexis follow the emoji instructions on Robyn's phone to the meeting of an a capella group at a warehouse.

Hooked On A Feeling

Cast

The a capella group starts a riff-off.

Song #2 in the riff-off; Castle notices one of the singers has the same bracelet as Robyn; Ryan and Esposito burst into the warehouse.

Better Days

Sofia Pettersson

At a party, Castle looks for a bathroom and ends up witnessing a murder.

Flashback to Castle meeting Joanna and Roger Masters and the Beakmans.

Castle convinces Vasiliy to invite him, Beckett, Ryan and Esposito to the consul party; Vasiliy asks the group to 'stay cool' because he vouched for them.

Even If I'm Loud It Doesn't Mean I'm Talking to You

Tove Styrke

Emma Matthews gets ready to go out, then sees a target drawn on her dresser mirror.

Stompa

Serena Ryder

Montage of L.A.; as they check into a hotel, Alexis informs Castle that she and Hayley are planning to check out guys.

Move Bitch

Disturbing tha Peace

Beckett and Castle's kiss is interrupted by Lucy, Castle's smart home personal assistant.

Ave Que Emigra

Gaby Moreno

Esposito takes Sonia to his family's dinner get-together.

The Knife

Bernard Herrmann

Lucy interrupts a warm moment between Beckett, Martha and Alexis.

Zane Cannon practices a scene from Hamlet, then is stabbed in the chest.

Greensleeves

Cast

Castle, Ryan and Esposito find Naomi Fox humming when they go to question her about Zane's death.

Worlds On Fire

Zerbin

Castle pulls into a spot in a parking garage.

It's A Sunshine Day

The Brady Bunch

A guy sings along to his radio while driving around with someone in his trunk, then he stops, pours gasoline on the car and ignites it with a flare; [0:28] repeats as Castle unknowingly hops into a cab with the Right Hand Man.