Beckett's frustration with the suspect was evident. She couldn't understand how he simply couldn't remember anything when she remembered every single detail of her ordeal. She blurted out, "I was shot in the chest and I remember every second of it."

The words hit Castle in the chest. He had been watching the interrogation from the observation room and knew as soon as she said those words what it meant. "You remembered?" he whispered to himself. Esposito and Ryan were in the room with him and heard Castle's words, but they meant little to the partners.

Unexpectedly, Castle turned to the door and walked out of the room despite the interrogation continuing. He walked dazedly to Beckett's desk. Without hesitation he took his chair—the one that had sat next to Beckett's desk for years, the one that remained in place while he was summering at the Hampton's, the one that sat there empty while Beckett recovered from her gunshot and even when Castle had been kicked out of the precinct by Gates. He picked it up and moved it to the break room. He shoved it, unceremoniously, under the table and walked to the elevator.

As the doors to the elevator closed he glanced back at the room and saw Beckett putting on her jacket, freeing her hair with her arm. He vowed to commit that view of her to memory, because he was done—done with the precinct, done with Nikki Heat, and done with Kate Beckett.

Kate was tired after the interrogation, she had gained little knowledge and the emotion of the questioning drained her. She knew there was a lot of work to still be done, but she needed a break. She headed to her desk and grabbed her coat. She wondered where Castle was. When he wasn't in the interrogation room with her he usually watched it and met her at her desk afterward. She caught sight of him in the elevator as she finished putting her coat on. She was sure that he saw her, but he didn't move to hold the elevator doors like she expected.

Kate looked around for Esposito and Ryan. When she couldn't spot either of them she continued her search in the break room. She saw them, "Hey, I just saw Castle on the elevator, do either of you know why he left early?"

The boys glanced at each other and shrugged their response. "No idea. He made some remark during the interrogation and left the room quickly. We didn't see him after that."

"A remark?" Kate inquired. "What did he say?"

Ryan answered, "I don't know exactly. Something about 'remembering'? He said it real quiet and didn't repeat it when we asked."

Kate retraced her steps from the break room to her desk and that is when she noticed the missing chair. She called out, "Esposito, Ryan, can you come here."

The boys heard urgency and distress in her voice and hurried to her side. They instantly saw what was missing. "Where's Castle's chair?" Esposito asked aloud. It was the question the other two were thinking.

"I was going to ask you two that question," Kate responded. "It was here earlier, I know it was, he was tilting back on two legs and I warned him that he was going to fall over."

"You don't think he moved it, do you?" Ryan mused.

Reality hit Kate like a Mac truck. Instantly she connected what she had said in the interrogation with Castle's abrupt departure. She knew what "remembered" meant and it meant that Castle felt betrayed, hurt, and deceived. "Oh shit, I messed up guys and I don't know how to fix this." Kate knew that Castle had moved his own chair. It was his way of saying that this partnership was over and it was a pretty final good-bye.