He sits in the doctor's office, in an exam room. They both wait on the technician to enter the room. The room is entirely filled with awkward silence. Kate stares at her phone. Castle looks up at her, and rolls his eyes. Once again her priorities lie somewhere other than where they should.

"Sorry it was work," she explains.

"I think it can probably wait a few minutes."

"They haven't even started yet," she points out.

There is a knock on the door, and the technician enters the room. She smiles as she enters the room.

"Are you ready to get started?"

"I just want to get this over with," Kate admits.

"Go ahead," Castle nods, smiling graciously.

The technician squirts gel on Kate's abdomen.

"Did you already have an ultrasound without me?" Castle questions.

"No, this is my first one."

He furrows his brow, "What do you mean this is your first one?"

"I had to reschedule a couple of times because of work," she reveals.

"Of course you did," he rolls his eyes.

The technician moves the probe around until she locates what she is looking for. She begins taking measurements. Castle notices that she is being eerily quiet.

"Is everything okay?" He questions

"Fine," she answers too quickly.

Kate turns her head, and looks at the screen for the first time. Castle tilts his head, and closely examines the image.

"Why is there a foot on top of the baby's head?"

Kate's eyes widen as she takes a closer look. The technician moves the probe, and reveals the reason.

"Oh, well that makes sense," Castle comments before he has had enough time to fully process the information.

The technician moves the probe, and the sound of a heartbeat fills the room, "That is baby A's heartbeat."

"Baby A? What do you mean baby A?" Kate questions.

"It is strong, and regular."

"Does that imply that there is a baby B?" Kate queries.

The technician moves the probe once again, "And here is baby B's heartbeat."

After finishing examining the hearts the technician zooms back out.

"You didn't know that you were having twins?" The technician quizzes.

Kate is now as pale as a ghost, as all color has drained from her face. She shakes her head, "No."

Castle speaks up, "Can you tell if they are fraternal or identical?"

"They share an amniotic sac."

"So they're identical," Castle clarifies.

"Yes," the technician confirms.

She sits in her apartment, alone on her couch. She stares at a picture of two babies. She looks over at the coffee table. She vacates her seat, and removes her empty glass from the table. As she moves towards the kitchen her anger grows. She stops before reaching the kitchen, and throws the glass at the door. It shatters all over the floor. Her phone begins vibrating, on her kitchen counter. She glances at the display. She groans inwardly as she reaches for the phone.

"Hello?" She answers angrily.

"Kate, can we talk?"

"Castle I can't do this right now," she insists.

"I know that you're upset, but I want to talk about this."

"What is there to talk about? You want a divorce. You want to take this baby, these babies from me. You are waging a war, and I haven't even gotten the opportunity to put on my battle gear."

"I don't want to wage a war."

"That is how it feels."

"Can we just talk?"

"It's getting late," she argues.

"Please, this is important."

"Fine," she growls.

"Meet me, in ten?"

She finds him sitting on a swing in the park in the dark. Without a word she takes a seat in the swing next to him.

"Castle, what are we doing? This isn't working."

"What do you want me to do?"

"I want you to give me the opportunity to wrap my head around all of this."

"You have known for a while," he reminds her.

"I just found out that we're having twins. Everything is happening so fast, and I am…" she trails off.

"Kate I am not trying to be the bad guy here."

"You are certainly portraying yourself in that role."

"Kate, that isn't fair. We have to make some progress. At some point we have to figure out how we are going to co-parent."

"Please! Just stop. I am scared, and I am alone. My partner has gone off the reservation, and I have absolutely no idea how to handle this."

"You are the one who wanted out of this marriage," he reminds her.

"I never said that."

"You wanted to chase after villains in the dark, by yourself. I don't support that, and I won't. I can't sit back and let your crusade endanger your life and the life of our babies."

"This wasn't planned. Until I found out I hadn't even considered what this would mean."

"It's time to consider it."

"I need time, Castle."

"I have given you time. Kate, it is time to decide. You can come in from the cold, or you can keep running after monsters in the dark of the night."

She locks eyes with him. "I need my partner. I can't do this on my own."

"You know where I stand."

"You are asking me to give up everything that I have worked for my entire adult life."

"Your life goals should shift accordingly."

"You're saying that I should give up my job because I'm pregnant?"

"Every time you put on your badge, and you gun, you step into harm's way. If you want to be the captain I can support that."

"You support me if I stay behind the desk, and push papers around. That isn't who I am. You knew that when you married me. It isn't fair to ask me to change who I am because I am carrying your seed. Castle, it is an archaic idea. I am not asking you to give up writing."

"I sit behind a desk."

"You go out in the field to find inspiration for your work. You put yourself in harms' way. How is that okay? Does it make it okay because you're the man? Are you saying that because I am the woman I should be at home with the kids?"

"That is not what I am saying at all."

"What are you saying?"

"Just real it in a little bit. Drop this crusade."

"It still won't be over. They want me to drop it. They are looking for the upper hand. If I drop it they will come for us. They will do whatever they can to hurt us."

"You have to put an end to this madness."

"The only way for this to end is for me to be dead."