Catherine glared at the computer screen. The website for her former employers still had a team photo of her, Jamie and Leon there in the archives. She narrowed her eyes as she glared at the screen.

"Why?"

"Why what?" Ruth asked as she approached her.

"He was my friend." Catherine paused. "In Israel we were like the Three Amigos. We were so close." She paused. "Like I had two extra brothers."

"You don't think he was responsible? For Leon's death?"

"No." Catherine paused. "No, I don't. I don't want to think that." She looked up as Ros and Lucas re-joined the Grid. Lucas looked angrier than she had ever remembered seeing him while Ros looked like she had gone in the ring with Tyson. She turned back to her screen as she thought about her time in the Middle East. "We made some brilliant documentaries. We worked so hard out there."

"I know." Ruth smiled slightly. "I watched them all."

Catherine looked up, surprised that her stepmother had bothered to watch her old work. "I don't want to think it, but I think Jamie was involved in the bomb on the bus in Tel Aviv. The one that nearly killed me."

"Why?" Ruth watched her. She knew being an analyst and researcher was the hardest job on the Grid. Her brain often had to overrule her heart. Finding the information, they needed relied on them being able to think clearly and not let emotion get the better of them. Ruth, out of all the officers in the Section knew that was the most difficult part of the job they did.

"I don't have the evidence." Catherine sighed. "I just."

"Then concentrate on what we do know." Ruth looked over to where Ros and Lucas seemed to be preparing to leave the Grid. "That's what we need to know, where would Jamie be now? Why is he helping Peterson? We focus on that. See what else comes out the woodwork."

Catherine nodded as she clipped the image she wanted before sending it to Zaf and Adam.

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The manager of the supermarket had been more than a little disconcerted as Adam had walked into her office. The woman, clearly in her early 60s with a face that reminded him of too many hours on a sunbed. Zaf had felt sorry for her in the first few minutes but then they had seen how much of a jobsworth the woman was and all his empathy had drained away in an instant. What seemed like an age later he was back in the car park with the information they needed.

"Catherine was right." Zaf paused as he followed Adam back to the car. Adam nodded.

"Yeah."

"This Jamie bloke." Zaf headed towards the driver's side of the car. "He was friends with Catherine. Why has he turned on her?"

"Money?" Erin stated as she joined them. "What usually causes someone to betray a friend? Money. Status, ideology, sex?"

"Can we not talk about sex and the girl I grew up with please?" Will pulled a face as Adam and Zaf smirked. "She's like a big sister to me."

"So? Did you find anything?" Adam asked as he looked over the car park. "Why here? Why set it to go from here?"

"Wi-fi signal?" Will asked. "Convenience?"

"Nothing Peterson ever does is just for convenience." Adam snapped. He remembered a time when he had been looking for the man years earlier. He knew the reputation of the man they had been looking for. Zaf pulled his jacket closer to him as his phone bleeped.

"Its Catherine." He opened the message she had sent them. "That's him. That's who we saw on the CCTV."

"Right, ok." Adam nodded once. "We have a positive ID. All we have to do now is find him."

xxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Harry gripped the rail surrounding the roof of Thames House as he thought about the last time he had seen Peterson. The man had been arrested moments after Ros had shot Mace dead in order to save Ruth's life. He had wanted to kill the man but then Ruth had been his priority. He didn't even remember the man being arrested. Bowing his head he tried to clear his thoughts, to make sure he wasn't letting the past influence the way he acted in the present.

"Harry."

He sighed as he heard his name. A moment later a hand was prying his off the metal rail. "Look at me."

"Ruth, I."

"We have him in custody. We know who his accomplice is." She spoke calmly.

"That man tried to kill my daughter. Twice."

"Yes." Ruth sighed.

"Was involved in your abduction."

"Yes."

"And Ros. He."

"Broke her nose and cheek bone. I know." Ruth paused, the anger at her friend's injury burning in her gut. Her and Ros had not had the easiest start to their friendship, but she knew the blonde woman had been the one to save her life. Without her, Mace would have murdered her just to get to Harry.

"The man in dying. He has an inoperable brain tumour. He is dying."

"Some would say that is Karma." Ruth's voice hardened slightly, taking on an edge Harry knew was uncharacteristic for her. She felt his fingers curl around hers.

"Ruth."

"A normal human would not be wasting what time they had left hurting those he believed had done him an injustice. There's more to this. I want to talk to him. I want to be in the room when he is interviewed next. I need to read him."

"Ruth. You."

"Lucas and Ros didn't finish talking to him. Put him in there with officers he hasn't met before. Dimitri or Alec. But let me be there."

"You are an analyst."

"Yes." Ruth looked him in the eye. "Let me analyse him. He's planning more than revenge, Harry. I know he is. I just don't know what."