A/N: Sorry about the mix up with the series I've written, for some reason I posted the other two when I didn't finish this. But it's still not finished so please review.

In Angela's office, she was sat on her desk while James was sat on the sofa. "So you're a writer? That must be fun," she said to him, "plenty of hanging from ceilings and such."

"I…err… I find it easier to think when I'm out of the way. It seemed like the best place."

"Really?" Angela slid down her desk, "So what's with you and FBI chick?" James suddenly felt rather uncomfortable. "I think that's a conversation for another time, don't you?" he replied, standing up to leave. Angela joined him standing up. "Sorry, you don't have to go do you?" James nodded and quickly walked off.

Brennan adjusted her gas mask that was pulling tight on the back of her head. Carefully, she examined the remnants left by the gas that had killed Melissa Stanford. It was like a yellowish residue that smelt disgusting. Brennan coughed slightly in her mask. Hydrogen Sulphide. She wrote on her pad along with the other notes from the case. She left the lab and pulled off her mask. Booth approached her and asked, "So Bones, you find anything?"

"Well, I…" she started, but didn't get to finish because James had just walked past and Booth had started to follow him. "Never mind," she called after him. FBI are more trouble than they're worth, she thought, not like scientists.

"Hey, you over there." James spun round and spotted the man from earlier. He was tall with dark brown hair and was wearing a suit. As he strolled forward, James spotted a holster and gun, hidden beneath his jacket. He suddenly felt very on edge. "Yes? Can I help you?" Booth sighed and smiled. "What do you want with Elle?" James frowned. "Who?"

"Trinity. What do you want with her?"

"Nothing. Well, nothing that concerns you, whoever you are." Booth stepped closer so he towered slightly over the writer. James ignored the six inches between their heights. He was used to people thinking they could push him around because they were bigger than him. "Special Agent Seeley Booth," he introduced himself. James shrugged. "Elle used to be my partner."

"Oh is that all?" Booth gritted his teeth. James noticed that he was making the FBI agent angry and removed his glasses just in case. The last thing he needed was another pair of broken glasses caused by an FBI agent. "Actually," Booth continued, "it was a little more than that."

"Really. Well that's nice. Now how about you stay the hell away from her." Booth felt the urge to grab his gun but refrained, desperately trying to remember that all murder was illegal, even if he did have a license to kill. "And why should I do that, eh?"

"Because she's moved on." Booth smiled. "So she did mention me then?" It was James' turn to step forward. "And she didn't have a nice word to say about you. I guess you really screwed her over."

Booth smiled again and said, "In a manner of speaking." That was too much for James and before he could stop himself he'd punched Booth in the face. The FBI agent clearly hadn't been paying attention and flew backwards. Sitting up, he could taste blood running from his nose and into his mouth. "Right, that's it!" Booth yelled as he leapt up. James expected him to cuff him for attacking a federal agent but instead Booth swung and hit him right across the face. James stumbled back slightly and touched his lip as it bled.

Trinity was talking on her cell as she looked for Brennan when she heard some bangs and shouts from around the corner. Hanging up the phone, she ran round to see what was happening. She emerged just in time to see Booth knock James clear off his feet. James rubbed his head as he got up and then he cringed when he realised what had happened. He pulled out a broken pair of glasses out of his back pocket. "Bugger."

"James!" he turned around when he heard his name. "What's going on?" Trinity asked as she approached him. He merely held up his glasses and said, "I broke my glasses."

Brennan shuffled into her office with the notes that she'd got from Hodgins about Hydrogen Sulphide. Apparently, it inhibits the exchange of oxygen on the cellular level and causes asphyxiation. That was obviously what had killed Melissa. It took her a few minutes to notice the group of people sat in her office. Booth was nursing his bleeding nose while James held an ice pack to his bruised head. Trinity was sat behind Brennan's desk looking furious while Hodgins couldn't stop laughing. Just as Brennan was about to ask what was going on, Hodgins stepped in and said, "Just in case you were wondering, Popeye and Pluto here were just having a little fight over Olive Oil again."

Brennan pulled a face at the pop culture reference and replied with her usual phrase, "I don't know what that means."

"It just means that those two over there decided to knock a few pieces out of each other," said Trinity with anger in her voice.

"He started it," Booth mumbled under his breath. Brennan smiled and shook her head. "Anyway, our victim was killed by Hydrogen Sulphide for those of you who have been busy doing other things," she continued, "It was asphyxiation that killed her."

"Come again, Bones?" Booth said to her whilst rubbing his injured nose.

"Asphyxiation is a loss of consciousness due to the presence of too little oxygen or too much carbon dioxide in the blood. The victim may stop breathing for a number of reasons; in this case it was suffocation by use of gas." Booth nodded, still not a clue what was going on. James pulled out another pair of glasses from his coat pocket and placed them on his nose. "I think it's time I went," he said, standing. Before he had chance to move, Booth had leapt up in the air and grabbed his arm. "Excuse me, but I feel there's something I need to say before you go." Trinity smiled. That was the Booth that she was used to. Grinning, Booth pulled out a pair of handcuffs and spun James around, reciting his well-practised speech of: "I am arresting you for the assault of a federal agent. You do not have to say anything." The FBI agent pushed his captive out of the door before anyone had chance to say anything. Brennan glanced at Trinity. "Not what you were expecting?" Trinity just stormed out of the door. "I guess not."