Wow, I'm sorry. You guys must have thought that I was dead. Alas, it was only finals. But school is out and I can continue with my story :) And to answer some of the reviews, yes, I have a thing for cliffhangers. Its a problem...

Chapter Twelve:

After many hours of walking, constant directions from Sherlock, and multiple complaints from Rory, they arrived at the engine room. "We made it!" Amy exclaimed, throwing her arms around the Doctor. Then she turned to Sherlock and hugged him as well. And then she turned to hug Rory, so he wouldn't feel left out. The Doctor unlocked the door with his screwdriver, and silently prayed that none of the crew would be in there. A blast of sounds and the smell of oil hit them as they entered the empty room. The Doctor smiled, finally being his element. "Give me two hours," he said cheekily. And he started tinkering with spare parts, occasionally ripping parts off the console. The Ponds laughed, and sat down in a corner to chat. Sherlock simply sat on a box and retreated into his mid palace. He was thinking about Molly. As far as he knew, she was still back in the infirmary. He felt guilty about leaving her, especially with only Chase for company. There was something about Chase, something that Sherlock couldn't put his finger on. For one thing, Sherlock couldn't read him, albeit the obvious things, and this made him uneasy. And the way Chase looked at him and the Doctor was almost snake-like, almost like he was calculating their every move. Sherlock sighed and watched the Ponds interacting on the other side of the room. Amy was leaning her head on Rory's shoulder, and they appeared to be having a serious conversation.

"But aren't you worried about him?" Amy asked softly. She picked at her clear gloss nail polish. "I guess," Rory replied. "But we're going to be leaving soon. The murder can't exactly follow us home."

"Well I've been thinking about that," Amy admitted. "What if the murder can travel in time too? I mean, how else would he know the Doctor? Know him enough to want to kill him?"

Rory's eyes widened. "That's a really good point. Should we tell the Doctor?"

"Are you kidding?" Amy hissed. "I just don't want to worry the Doctor," she continued in a softer voice, seeing Rory's hurt. He shrugged. "I guess you're right." The two glanced at the Doctor, watching him work. He subconsciously grabbed tools and parts, creating something that looked like a sphere with a needle on top.

"Hey, did you bring the knife?" Amy asked Rory. He frowned at her.

"Yeah..." he said slowly. "Why do you want to see it?" Amy shrugged. "I dunno. I guess I just want to see those carvings again. They're kinda pretty, don't you think?" Rory looked incredulously at Amy. "Pretty? This blade almost killed the Doctor!" Amy rolled her eyes. "Oh, just give it here." Rory reluctantly pulled it out of his pocket and handed it to her. She ran her fingers over the design slowly, over and over.

A loud clanging noise came from behind a machine, followed by a loud curse word. Sherlock sprang up from his seat. "What the hell was that?" he shouted, then sprinted over to where the noise had come from. Amy and Rory quickly got to their feet and followed after Sherlock. The Doctor put down his gadget and looked up to see and dark figure dash out of the door.

"He's getting away!" When they didn't come running, he became slightly worried. "Guys?" Amy came out of the shadows slowly. "Rory?" she called. "Go after the guy." He diligently followed orders and bolted out of the door after giving her a quick kiss.

Amy turned to the Doctor. "You should probably come see this," Amy said quietly, looking down at her red converse. He frowned and walked over to the machine. He gasped when he saw what was laying on the ground. It was a blade, identical to the one that had almost killed him.

Amy was still holding the first blade, and when she got closer, they both started to glow an eerie blue. She dropped the blade quickly, and it clattered to the ground. The Doctor slapped his forehead in sudden realization.

"Oh, of course! That's where I've seen those designs before!"

"Doctor?" Amy asked.

"These two blades are a pair. They are called the Blades of Acerbus."

Sherlock looked up and made a face. "The bitter blades?"

The Doctor looked confused for a minute, then laughed. "Oh, no. Acerbus can actually be loosely translated to painful or harsh. Which these blades certainly are," he added in a newfound seriousness. "Whoever is trying to kill me sure means business. This is one of the few ways to completely kill a Time Lord. To wipe him from existence. No more regenerations, no matter how many you have left. If you stab a Time Lord twice, with both of these blades, within 24 hours, he'll die a painful death. One knife for each heart. I'm actually quite impressed," he mused, ignoring the horrified faces of Amy and Sherlock. "These blades haven't been seen each other in a millenium. I'm surprised he managed to reunite them. But don't worry," he assured them. "As long as we have the second blade, there's no way he can kill me."

Suddenly, Rory burst in, panting heavily. "I got him," he rasped. "Locked him up in a closet." He coughed and then looked up at them. "But guys. You'll never guess who it is."

Oops. Another one? sorry~