"They said you were injured," Kate looked up, startled by the intensity in her, usually rather docile, assistance's voice. She'd just sat down at her desk to rest for a moment before grabbing the papers she needed from her office. "Sorry," Osgood blushed a bit when Kate jumped.

"It's okay," she smiled at her friend and held up her wrist to show off the bite mark. "Just a scratch and this one won't even turn me into a space werewolf. Probably."

Osgood grinned a bit. That particular situation had been when they'd both been lab techs at the bottom of the UNIT food chain. It felt like eons ago, but it had really only been a few years.

"Here, let me see," Osgood walked over and set the first aid kit she'd brought on Kate's desk. Kate obediently offered her wrist for the woman's perusal. She studied the other woman's face as she pulled disinfectant and bandages from the kit. Her assistant frowned at the bite mark as she cleaned it, a little wrinkle appearing between her brows. The disinfectant was a product Osgood had developed herself and killed most known pathogens including extraterrestrial ones. Her assistant made sure to cover the entire wound before carefully wrapping it in a bandage to make sure it stayed fully coated for at least 3 hours.

"There we go, all better," Osgood told her with a smile, pushing her glasses back into place as they'd slipped down her nose a bit.

"Thanks." Kate smiled back, a bit amused with how painstakingly Osgood had dealt with the little bite marks. Her friend could really be a mother hen. It was actually rather cute. "So, do we know anything about our surprise visitor yet?"

"Not yet. They took fingerprints and blood samples, but I'm still running them. So far, she seems to have pretty much normal human DNA other than a few abnormalities which could be explained by her being from a different century." She paused. "I don't believe she bit you!"

"Well I had just drugged her against her will," Kate pointed out with a shrug.

"How'd she have time to bite you after the sedative was in her system? She should have been out of it almost instantly. Do I need to revamp the formula?" Osgood inquired.

"No. The formulas good. I think she's just stubborn." Kate leaned back in her chair with a sigh.

"Long day?"

"I'd just been about to fall into bed when I got the phone call." She looked up at Osgood who was now leaning on her desk. She was wearing one of her long, white lab coats, but Kate could see one of the wrinkled tie-dye T-shirt she favored after business hours peeking out from under the collar. "They don't pay us enough for this."

"Oh but we get those complimentary vacations to the Gobi desert." Osgood said cheerfully.

Kate chuckled. "Yeah. Fun times." She sat up and looked at her watch. "I should probably go. I've been gone too long." Kate grabbed the papers she was originally there for from her desk.

"Yeah. The blood and fingerprint analysis is probably almost done by now."

"Keep me posted on that."

"Yes, ma'am."

"How many weapons did you find on her?" Kate asked.

The man shook his head. "An entire arsenal. I don't even know what half the things do."

"But you're sure you got all of it?"

"No idea where else she could hide anything."

"Well that's certainly one thing I'm going to have to ask her about." The other things including how she had created such a time distortion with just a vortex manipulator. They'd found the piece of future tech strapped to her wrist, though it seemed to be absolutely fried. They'd found no other known time travel devices on her, so, they figured whatever had happened to the vortex manipulator must have caused the disruption. Her mobile beeped. "Yes?" She ask into the phone.

"Kate," there was an odd lilt to Osgood's tone that Kate couldn't place.

"Yes, what is it?"

"We got a match back on the fingerprints." She informed her. "Um. Remember when Harkness gave us access to some time agent files after the Peterson-Leber debacle?" Yes she did. It had been a little bit before she'd taken over as the head of UNIT. UNIT officials had detained a time agent who'd been hunting down a terrorist from the 50th century and, worse, had let said terrorist out of custody to wreak havoc on the unsuspecting 21st century. Though Harkness wasn't UNITs biggest fan, he decided to share some of his knowledge on time agents and the worst criminals up until he left the agency himself in the early 51st century. He said it was more out of self-preservation than anything. "Well," Osgood continued, "she's in the files."

"She's a time agent?" Kate asked hopefully.

"Unfortunately not. She's considered one of the most violent criminals of the 51st century. She was sentenced to 12 thousand consecutive life sentences at the top security prison in the universe."

"What on Earth did she do?"

"She's an assassin for some fanatic religious group. Among other things..." She hesitated. "Among other things she was convicted for the murder of the Time Lord known as the Doctor."

Kate didn't speak for a moment.

"Kate?" Osgood spoke from the other side of the phone. "I'm sorry. I knew how much he meant to your father."

"Are you sure he really...?"

"There was an investigation, eye witnesses, and she confessed. From the description, it seems to have been the face you met a while back."

Kate exhaled slowly. She didn't know how to process this information. She's only met the man a couple of times, but her father had told her a lot about him and she'd read all of his UNIT files. From what she'd seen and been told, he'd been an amazing man and one of her father's best friends.

"Kate?" Her friend's voice was worried.

"I guess we'll find a way to contact the proper authorities about her whereabouts." She wasn't exactly sure how to do that considering the proper authorities wouldn't be born for centuries. "I'm going to talk to her first though."

"Are you sure that's such a good idea?" Osgood asked. "You're a bit emotionally involved."

"I need to know Osgood."

"Yes, well, be careful. She's got to be good if she was able to... She's got to be good."

"Don't worry. I've got it under control."

"Miss Trapper," Kate said. The woman in question jumped at the sound of her own name.

"Miss Stewart, um ma'am," she stuttered a bit.

"What are you doing here?" Kate asked. Here being just outside the interrogation room holding River Song.

"They, um, they told me that, um, well..." Kate gritted her teeth, waiting for the woman to spit it out. She didn't know what Trapper was doing working for UNIT if she couldn't even speak to her superior without tripping over herself. She'd worked with the woman twice and each time Kate was barely able to contain her annoyance long enough to get any work done. "T-they said you need, a, well, a psych evaluator. You- they s-said you were going to interrogate a, a possible m-murderer and you needed someone who could, um, recognize body language." Her Scottish accent was barley even recognizable with all the stuttering. "So, they sent me and now I'm here. If you need me that is?" She had wanted someone with a psych evaluator background to help her with the interrogation as she wasn't sure about Song's mental state, but she didn't want someone who could barely look Kate in the eyes. River Song could probably rip her to shreds with a well-placed scowl. Kate sighed.

"Yeah, come on," she motioned to the woman moving to the door of the interrogation room. She scurried after her. "Is she awake?" She asked the man guarding the door.

"She woke up about ten minutes ago. She should be awake enough to talk."

"Good." Kate took a moment to gather herself and then opened the door to the interrogation room.

At first glance, River Song didn't look like a cold blooded killer. She was still in the cloths she'd arrived in, a dark blue blouse and jeans. However, they'd removed the jacket full of weapons. Her hair was still as crazy as it had been when she fell into the 21st century. She looked up when they entered the room, her eyes sparked with recognition and maybe a little resentment when they landed on her face, but her eyes didn't have the cold sparkle she was used when looking at a killer. She looked like a normal woman, if a bit annoyed.

"Is this how you welcome everyone to your planet?" She asked rattling her handcuffs a bit.

"Just the ones who fall through strange cracks in time." She answered. "We haven't been properly introduce. I'm the head of the Unified Intelligence Taskforce. My name is Kate Lethbridge-Stewart." She didn't usually use her full name anymore. Though it was no longer a secret who's daughter she was, now that she'd made it clear to everyone in UNIT that she could stand on her own, she still usually just said Stewart out of habit. However, if this woman had been sent to assassinate the Doctor, she might know of her dad.

Songs eyes flickered a bit at the name, but she didn't seem too bothered.

"My associate and I have a few questions for you." She waved Trapper into the room. The woman nervously danced in behind her.

Songs eyes flashed to the new person and she sat up just a bit strainer.

"Hi," Trapper said swallowing a bit. When Song didn't acknowledge her greeting, she walked forward a few steps and offered her hand. "Missy Trapper." Song just looked at the offered hand. "Oh right," she blushed a bit when she remembered Song's hands were cuffed to her chair.

Song looked her up and down for a moment. "Missy." She repeated skeptically. Then she smiled, though something about the smile sent warning bells off in Kate's head. "Nice to meet you. I'm River Song."

Trapper pulled out one of the chairs across from Song and sat on the edge of it. She looked back at Kate, who just leaned against the wall behind her and jerked her head to tell the woman to continue. "We, um, ran your finger prints through our database while you were, well, unconscious."

"Really now?" Song inquired leaning back in her chair casually as though she weren't handcuffed in a secret military base. "Find anything interesting?"

Trapper swallowed. "Well, we found your criminal records."

"Quite a collection isn't it," she looked proud of that fact.

"One of those records," Kate cut in from her position against the wall. "Indicated that you were indicted for the murder of a man called the Doctor."

Song looked at Kate and then turned her attention back to Trapper. "Yes," she confirmed with a ghost of a smirk.

"Why?" She looked back at Kate and, suddenly, that cold murderous spark that Kate had noted was missing from her eyes was there. Her smirk grew into a toothy smile.

"Because I did it."

"Why?"

"That was my purpose." She told Kate, her tone flat. Kate felt goosebumps travel up her arms. Her well-trained fight or flight response kicked in at the sound of her voice or maybe the look in her eyes. Something in Kate was telling her to run from this woman. "I was bred and conditioned for one purpose. To identify, isolate, and eliminate Time Lords." She slowly turned back to Trapper leaning forward to meet her eyes. "Do you honestly believe I can't tell when one is sitting right in front of me?"

There was a pause. "I don't know what you mean" Trapper responded, but her tone was different. It wasn't the nervous, stuttering tone she usually had. It was smooth and lilting, mocking. Kate stood up a bit straighter, confused, but sure whatever shift had just occurred in the woman was not a good sign.

"Oh, please," Song rolled her eyes. "Missy? Really? How did he ever fall for your pseudonyms?"

"Hmmm. Pretty and smart." Trapper leaned back in her chair and tapped her lips with her index finger. Something was very wrong.

Songs eyes flickered to Kate for just a second, but then went back to watching Trapper. "You're the Master." Everything in Kate froze at the name. She knew the stories of the Master, everything he'd done or tried to do to the Earth; sometimes he was only just stopped by the Doctor. How could meek little Trapper be the Master.

"Yes," Trapper, the Master, Missy, confirmed with a lopsided smile. "And you're The Doctor's murderer. Now how did that happen?"

"Easily enough," Song answered. "I shot him."

Missy giggled and if she'd thought River Song's voice had given her goosebumps, it was nothing compared to that sound. She felt herself reach for the gun that should have been on her hip, but she hadn't brought it with her to the interrogation. "You obviously don't know the Doctor if you think that killed him," Missy said.

"Let me rephrase." Song said, her face eerily impassive. "I shot him. Waited until he started to regenerate and then shot him again before he could change. Then I burnt his body and sunk it to the bottom of a lake. Tell me. Would that kill a Time Lord?" While most of her speech had been emotionlessly informative, the last two sentences seemed more like a threat.

The mocking smile slid off Missy's face. She almost looked worried for a moment, which was even more troubling for Kate. But, then, she was back to her slightly mad grin.

"Oh, please, do you know how many times I thought I killed him just for him to show back up at the most inopportune times?"

"Yes, I do in fact." Song informed her. "I've studied all of your plots and analyzed your mistakes."

"And what were my mistakes?" Missy seemed almost affronted.

"You didn't actually want to kill him. Not really. At least not permanently. It was a game for you and a game is no fun without an opponent. Part of you wanted him to survive. I had no such qualms." She stared into Missy's eyes without flinching.

Missy blinked. "You really did, didn't you."

One of Songs eyebrows rose almost amused. "Yes."

"I've got to say. I am impressed."

"I did not do it to impress. I did it simply because that was my purpose." The words were flat, emotionless like a machine.

Kate didn't know how to get out of this situation. She was a doorway away from the cavalry at her beck-and-call, but she couldn't think of a way to get there without drawing attention to herself. She knew what The Master was capable of. He or she was psychotic, unpredictable, and wasn't afraid to kill everything that got into her way. She wasn't however sure what River Song was capable, but the mechanical way she had spoken of murder chilled Kate to her bones. Worse, if she didn't know better, she'd say the expression on Missy's face showed was just as terrified of River Song as Kate herself was.

But then Missy's face smoothed out. "Well then Miss Song, how would you like a new purpose?"

"Are you planning on giving me one?" Song asked with what could pass for interest.

"Well I'd had a little plan to burn this entire world to ash."

"Oh, really?"

"Well I didn't infiltrate this pesky little organization for no reason. I have it on good authority that they've come across a machine that could incinerate their planet and they don't even know it. Of course now that my covers been blown, I need to move my plan up bit. You have potential. You could join me. Blowing up planets is even more fun than you'd think."

"That's a very nice offer, Missy," Song said with a smile. "My only problem with it is, while I'm a psychopath there are in fact two things in the universe I care about. Those two things are my parents. Who, unfortunately for you, happen to live on Earth in the 21st century." For the first time since they'd mentioned the Doctor, real emotion appeared on Song's face: anger. "I'm afraid, I'm going to have to stop your plan."

"Well that's unfortunate," Missy pouted getting to her feet. "You could have been useful." She took what appeared to be an advanced looking gun out of her lab coat, but before she could aim the weapon, Song was over the table, somehow having undone the handcuffs.

The look of surprise on Missy's face was almost comical as the device was knocked out of her hand. Song wasted no time in slamming her fist into the woman's face. Missy went down, but lashed out trying to kick the other woman. Song jumped out of the way, but Missy had grabbed another weapon out of her pocket. Song scrambled out of the way of the blast as Missy sprang up. Whatever the weapon was, it was able to blast a three-centimeter hole in the cement wall. She shot it again as Song kicked her in the stomach causing the shot to go wild. This time it was Kate springing out of the way. She dived toward the previously dropped gun and grabbed it as Song disarmed Missy again.

Having heard the gun shot, the guard opened the door just as Song kicked Missy again sending her flying into the man. She scrambled off the dazed man and Kate shot at her as soon as she was sure she wouldn't accidentally hit her soldier, deciding that taking down the psychopath that planned to burn the earth took priority over the psychopath who had vowed not to do so. She managed to graze her target's arm. Song hopped over the dazed guard who looked at his commander in confusion.

"The black haired one. We're trying to shoot the black haired one!" she informed him even as she herself jumped over him.

The two women were fighting over something when suddenly Song was blasted away from Missy landing between Kate and the guard. She rolled to her feet.

"Well, this had been fun, but I really must be going now!" Missy yelled pushing a button on the device in her hand. There was a huge bang and Kate felt something slam into her side. Her head hit the concrete and the world went black.

River hit the floor hard as she was blasted away from Missy. She would defiantly be bruised later, but, for now, she jumped to her feet only to see Missy getting ready to hit a button on her device. Bomb, she thought instantly. She was a few seconds ahead of the two humans in the room partially because she had probably been exposed to more explosives than they had and partially because her brain processed things just a little bit faster than most humans.

This was going to be bad.

She mentally categorized the room and made a decision just as Missy was about to set off the explosion. She round kicked the soldier next to her so he fell under the doorway which would hopefully protect him from the soon to be falling building. In the same movement, she lunged at Kate Stewart. The explosion happened while she was midair. She bowled into Kate just as the roof started to come down. The woman's head smacked the ground, probably giving her a concussion, but River didn't have enough time to worry about that. She covered the woman's body with hers the best she could before she felt something fall on top of her. She gritted her teeth and moved one arm to protect her own head. The other gripped Kate Stewart. Then, she waited.

She felt something else fall on top of her. Something stabbed her in the thigh sending pain radiating through her. She could hear more things falling, crashing into each other. Something must have caught fire because she could now smell smoke. Hopefully, the fire wouldn't reach them. Another object fell heavily onto her foot and that must have caused just enough damage to her system because she heard a little beep. She gripped onto Kate harder as she felt the device she'd had implanted in the back of her neck activate.

'Somewhere with a breathable atmosphere. Somewhere with a breathable atmosphere,' she thought as she felt reality stretch a bit around them. She closed her eyes as she felt herself yanked into the vortex.