Stella's POV

I was on my bed, playing a game on my phone. Ella was on the computer. Every once in a while, she'd look at the closet. Finally, I got so annoyed I paused the game and said, "Ella, relax. It's not going to hurt us. Remember? Pretend it isn't there."

Ella relaxed a little. "Stella, I just can't stop thinking about it. It feels so weird to have led one life then suddenly, bam! You're living a totally different one."

I sighed and said, "I know, Ells, but we just have to live with it. For me?"

She nodded. "For you."

I smiled and resumed my game.

All of the sudden, Ella jumped to her feet and looked out the window. "Ella, what's the matter with you?" I asked, alarmed.

"No-nothing," she said. "I just thought- I thought I heard it again. The noise. Of him."

I joined Ella's side. We were on the eleventh floor of our apartment building. Besides, you couldn't hear much over the London traffic. So how could Ella hear something so subtle from this height?

She smiled. "I must be hallucinating."

I shook my head. "Ella, we need help. Not a therapist- they'd never believe us. I'm talking about sending out a distress signal."

Ella looked at me like I was crazy. "Stella, we watched it get destroyed. There were no survivors besides us. How are we going to find someone to pick up the signal?"

"We try," I said. Ella  shrugged and sat down on the bed. She hugged her knees to her chest and began muttering, "There's a man following us but no one can see him except my sister and I. There's a man..." over and over. I hoped it would work.

Doctor's POV

I opened my psychic paper and read the message out loud. "There's a man following us but no one can see him except my sister and I." I looked up. Amy looked at me. "What?"

"There's a message on my psychic paper. And that's what it says. There's a man following us but no one can see him except my sister and I." I hopped up to the console and pulled down the lever. "What are you doing?" asked Amy. 

"There's a signal with this message. Always a signal," I explained. Amy looked at me quizzically, but didn't say a word. I raced around the console to Amy. "I'm picking up a Time Lord signal. What if it's the same person sending out the signal?"

"What if it isn't?" shot back Amy.

"Nonsense, it's coming from the same place."

Amy raised an eyebrow. The TARDIS landed and we got out. I looked around. "London, present day," I said proudly. I pulled out my sonic screwdriver. "It's coming from this way," I said, looking at the apartment right in front of us. "Eleventh floor, but I don't know what room."

"We just check every room," suggested Amy. I shrugged and headed in.

Ella's POV

"I'm telling you," said our foster mom impatiently, "this man is a figment of your imagination. If you want, I can call a doctor. In fact, I'll do that on the way to work. Happy?"

"No," said Stella. Mom glared at her. Stella shrugged. "Fine."

Stella and I were identical twins, with the same straw colored hair, only I wore my in a braid down my back, and Stella cut hers short. We had the same thin face, same grey eyes. We did the same clubs, played a sport each; Stella played basket ball and I played field hockey. We had the same sense of humor. But that's where the similarities ended. Stella was daring; I was not. She was the one who would do stupid things like put Mentos in her mouth, drink soda, and make a soda burst out of her mouth, the idiot who believed me when I told her that drinking a bottle of castor oil and eating a couple of raw eggs before a pie-eating contest would help her fit more pie in her stomach. I usally was the one thinking of the dares, and Stella did them, so we got along just fine. Of course, we had our occasional spats and fights (our most rememberable one- and most painful- was the time when she smashed a rock in my face and I shoved her into a tree, which grew in a stream), but what siblings don't? Other than that, Stella was my best friend.

Once in our room, Stella opened a window. She peered out, then her face paled. "Ella?" she asked.

 "Yeah?" I asked, coming over.

"Do you hear that?" she asked.

I began to shake my head, but stopped once I heard what she was talking about. It sounded like a TARDIS with it's brakes on. But that wasn't possible...

"Stella, how is this possible?" I asked, clutching the necklace around my throat. It was a reminder of my old life, bought at a museum. I wore it every day, with hopes I would go back to my old life. I liked that life. I wasn't different, at least, not by that much. But here, on Earth, I was an oddity. A misfit.

Stella shook her head. "I think the signal worked," she said.

"Oh, gee," I said sarcastically, "You think?"

She shrugged and turned back to the window. I looked too. Right underneath our window was a police box. Stella and I shared a glance. "No..." whispered Stella breathlessly.

"We need to go and look," I suggested, and ran to the door, but Stella said, "Wait. There's someone coming out. We wait for him to go where ever he's going, then we go." 

I shrugged. "Oh, alright."

The man was now joined by a woman with red hair. He pulled out something from his pocket and walked in a circle. What ever that thing was, he stopped when it was pointing at us. I pulled Stella away from the window. "He knows we're watching," I hissed. Stella nodded. I walked back to the window and crouched down so my eyes were peeking just above the open window. They were heading to the apartment building that we lived in. "Oh, god," I whispered. "He-they- are heading into the apartment building, Stella!"

"So the signal thing worked?" she asked. I longed to slap her. She was my sister, but so obtuse at times.

"Yes, it worked!" I snapped. She looked taken back. "Stella, I'm sorry I snapped at you. It's just, well, kinda obvious isn't it?"

"It's okay. I just don't see the obvious, that's all," she shrugged, grabbed her phone off her bed and resumed her game. I went back on the computer.

Doctor's POV

Okay, this search wasn't going well. We check almost every room except one. I knocked on the door of that one and a man answered. "Yes?" he asked.

"Hello I'm the Doctor," I said for the billionth time. He looked at me, then said, "I'd knew she'd call a doctor but not this quick."

"Um, yes," I said. "I understand you have two children who believe they're being stalk by a man no one can see?"

"Um, yeah. Come in. They're in their room," he opened the door wide enough for me to squeeze through. I stepped into their nicely furnished living room. "Down the hall, last room to the left," he said.

"Thank you. What was your name again?"

"I never gave it, but it's Michael," he muttered.

"Thank you, Michael," I headed down the hall and opened the last door to the left. There were two girls, one on the bottom bunk bed, the other on a laptop on the floor. They were identical, minus the fact the one on the bed had her hair in a short bob and the other had hers in a long braid down her back. The one on the bed looked up. "Who are you?" she asked.

The other looked over her shoulder at me and pulled her self in sitting position, facing me. "I'm the Doctor," I said.

The two girls shared a look. "What?" I asked.

"Uh, nothing," the girls said simultaneously. I sat on the bottom bunk. The girl on the bed moved her feet.

"What's your names?" I asked.

"Stella," said the girl on the bed.

"Isabella, but everyone calls me Ella," said the girl on the floor.

"Nice to meet you, Ella and Stella. You look like twins. Are you twins?" I asked.

They nodded. "Identical."

"I see that." I reclined on the bed and looked at them. Stella moved to sit with her sister. "So you feel like you're being stalked by a man who no one can see."

"We are!" said Ella.

"But we don't know why," said Stella. She flushed pink.

"Do you?" I asked again.

They shrugged. Ella looked at the closet. I followed her gaze. "What's in your closet?" I asked curiously.

"The thing he's after," said Stella.

"Can I open it?" I asked. They shook their heads. "We don't want you to," explained Ella.

"You wouldn't believe us if we showed you. You'd just think it was some sort of art project or something," added Stella.

I raised my eyebrows. "Oh really?" I asked. They nodded. I walked over and tried tugging open the closet door. It wouldn't open, even when I tried using my sonic screwdriver. I looked back at the twins, who said, "We locked the closet so no one can get in."

"We don't know who to trust," added Stella.