A body in a bathtub of blood.
The team is at Castle's Castle (no, that is never going to get old) playing poker. We get a horrifying image of Mom Castle naked since her game is strip poker.
Beckett and Castle exercise their sexual frustration via the cards. Mom Castle is being annoying.
Beckett wins and promptly gets a call. Yup, for the body in the tub. Castle is excited.
Ah, it's not blood, it's motor oil. This reminds me of Quantum of Solace - the ending scene.
The hotel clerk is your cliched uninterested douche. Random drag queen walks by.
Motor oil lady (Allison Goldman) booked the room for five days. Castle says sex, Beckett says drugs. Whatever the reason, she was hit in the head and given a 'lube job.'
Her husband, Vaartan from CSI, told Castle and Beckett that Allison took a part-time job to help with the finances and to get back into the city when her husband lost his job.
Allison didn't work at the job (surprise!), so Ryan, Esposito and Castle decided that Allison had a boyfriend. Beckett pwns all of them. Castle really just encourages the frat house gossip, doesn't he.
Vaartan comes in with Allison's death certificate, except Allison died in the sixties, when she was three months old.
Back at Castle's castle, he's discussing the case when his mom calls him on letting Beckett win. The only she doesn't say is, "Oh, you like her! My boy likes a girl!"
Allison's online life reveals that she was talking to an 'author,' named Lee Wax. Castle is disgruntled.
Beckett gives him his poker winnings prompting Castle to hiss, "My mother called you, didn't she?!" She hisses back at him and while this description sounds like two cats, they do hiss at each other. Castle offers to set up a new game.
They walk into Wax's apartment and sees a shrine to Allison. Wax, who is female, turns out to be a ghost writer for Allison aka Cynthia Dern - domestic terrorist and very, very wanted.
Cynthia Dern set off a few bombs on a oil tanker. People died, the captain was paralysed. Wax offers more details - Dern wanted to write a book before surrendering. Castle calls Wax on Dern's bullshit saying she was hoping to get public opinion on her side.
Now the oil bath makes sense.
Dern refused to talk about anyone in her past. Wax admits she contacted a few of Dern's compatriots. She also asks to be kept in the loop, but Beckett tells her, "Nooo, I'm babysitting this one and I might want to sleep with him and you would get in the way."
Ok, she didn't but still. Wax hits on Castle instead. He manfully resists.
Beckett and Castle go to visit the captain and learns that their son, Adam (Pike) has been working to help his parents. They talk to Adam who tells them he was bartending the night Cynthia died.
Castle tells Beckett he hopes that Adam didn't do it because the family deserves a happy ending.
Just then Esposito comes up with news: Swanstrom, one of the bombers served 15 years for his part in the crime. Turns out he was given up by a tipster - a young female tipster.
Swanstrom seems to be well-adjusted for a guy who served 15 years. He built the bomb, but Susan Mailer and Cynthia were the ones who decided when it was supposed to go off.
Alexis points out that a ghost writer only knows what the storyteller tells them. Now that the storyteller is dead, Wax now has a true crime best seller. Castle confirms this by talking to Wax's publisher.
Beckett gets a call - Adam's alibi is no good. Turns out Cynthia might have been sending money to them for years. He went to the hotel to confront her that night, but never talked to her. Instead he moves the plot along by telling Beckett that a woman got off the elevator and went to Cynthia's room.
Castle thinks it's Wax and taps on the interrogation window. Really, he's like a big kid.
Wax denies it, obviously. She also didn't know about the money.
Castle randomly tells Beckett to remind him to never write a memoir.
Poker game - I guess James Patterson and Stephen J. Cannell were busy. We've got Beckett's boss, the mayor and Homer Simpson. They all discuss the case and in the talk-though come to the conclusion that Susan Mailer was trying to defuse the bomb.
During this, Castle asks Beckett to beat the pants off him. His actual pants.
And why did it tak them that long to decide that Susan Mailer was still alive? Who else figured that out about 20 minutes ago?
Also, Monistat ads are creepy - I never want to think of thunderstorms in my crotch. Or tweeting birds come to think of it.
Back at the Pikes, Beckett and Castle take a look at the cheques (no, not spelling it checks) and find Susan Mailer posing as Mary Wright. She was the one sending the Pikes money.
Mailer found Cynthia and threatened to expose the actual truth. Cynthia begged her to meet and so they did at the hotel. Cynthia offered Mailer a drink but Mailer is a teetotaler and refused, hiding in the bathroom. There she saw the bathtub filled with oil.
Cynthia was going to drug her with the wine and drown her. Instead, in the struggle, Cynthia hit her head on the sink and Mailer dragged her into the tub.
Back at the station, Wax comes in to chat, but Castle, who is smart AND pretty tells her that he figured her out. She told everyone she was in contact with Cynthia, hoping someone would come forward, get Cynthia arrested and get the book she wanted to write. She flounces out.
Beckett comes back and they chat, offering their views of the case. Then Castle gives her her winnings from the previous game. Castle still tries to get her to go for strip poker.
Hee!