The Doctor and Amy spun around to face the murderer. The Doctor's hand was in his pocket and a faint humming noise buzzed almost indistinguishably.
''I'm sorry,'' said the Doctor with no hint of politeness in his voice, ''I don't believe we've been formally introduced. I'm the Doctor. You may have heard of me, I'm the thing you should be worried about.''
''My brother did mention a boy fooling around downstairs who gave himself that title,'' said Naros, spewing out his words from the shell of Cole. ''I had a feeling it would turn out to be you. A curious title for a man who does not appear to have a medical background.''
''Yes, well, I think it's time for you to earn your death certificate,'' snapped the Doctor. The two men glared at each other, unblinking; unflinching. Amy rolled her eyes.
''Alright boys, enough of the one liners,'' she said impatiently. ''Speed it up.''
''If you wish to hasten your mortality then I will of course adhere to your request,'' said Naros monotonously.
''Who are you?'' asked the Doctor.
''What are you?'' asked Amy, scrunching up her face.
''Why do you assume I am going to tell you everything?'' Naros queried. ''You must have plenty of experience with the weakest of my 'type', as you would say. Generic villains. They give evil a bad name.''
''Whatever you're doing here, it needs to stop!'' said the Doctor furiously.
''Then my original question is answered. You do not see the purpose.''
''I've seen you purposefully killing people. Innocent people who you've involved in…''
''I can see it pains you to be unaware of the big picture. You have all the pieces, Doctor, but you remain puzzled.''
''Enlighten me,'' the Doctor spat. Naros walked around Amy and The Doctor as they watched him cautiously, while the droning from the Doctor's pocket became louder. He paused on the other side of the Doctor and Amy and gazed out of the window at the silent delusion of a perfect night.
''Mercy is a trait I unfortunately have to tolerate in this form,'' he said. ''It vexes me to watch you struggle to understand. Though I was impressed by how long you have survived. A whole two days. Most don't make it past the elevator but I could see you were suspicious of that from the start.''
''As much as I'm enjoying this little chat,'' Amy chimed in, ''can we skip to the end? We get it, you're bad.''
''I thought my brother might have stopped you in the lower deck,'' Naros continued as if Amy had not spoken, ''but I can see you are not a mere peon. It's a shame I cannot coerce you into the converter.''
His eyes glanced slightly towards the lifts.
''The energy you would provide would be more than enough,'' he added.
''The elevators,'' guessed the Doctor. ''That's how you get the energy. You needed to hide the converter as something that can be charged.''
''Maybe I was wrong,'' said Naros, surprised. ''Maybe not all of you humans are entirely worthless. Your brain could be useful, Doctor. It could do so much more.''
''Energy?'' queried Amy curiously.
''People. He's using people, sending them up the elevators and disintegrating them to fuel his ship,'' answered the Doctor, never taking his eyes off of his enemy.
''You know why we are here,'' Naros responded. ''Our ship will not transport without energy. You want us to leave, but we cannot until the ship is stable. To depart, sacrifices had to, and still must, be made.''
''There are other ways to fuel your ship, there are always other ways, you didn't have to kill anyone!'' the Doctor fumed. ''And what's more, you're making the ones you didn't completely destroy live through their murders over and over again.''
''But you do not see the beauty in it? They cannot die again. They are merely reborn. They are living on. I have saved them.''
''They still have memories; they still think they're real and they're going through all kinds of death each day! Your idea of heaven is their hellish reality. There's no beauty in what you're doing.''
''All I ask is that you let me take one more soul. One more and then I'll be gone, back to my own dimension forever.''
''To burn more planets and salvage dangerous creatures?''
''You have knowledge, Doctor. I'm impressed. Though you are wrong in your assumptions. I did not cause the supernova. I merely saw it coming. The Raxillion, however, you are correct about them. They are dangerous. Which means to me, they are useful.''
''Whatever your intentions, I'm afraid I can't let you fulfil them,'' declared the Doctor.
''Then I'm afraid you must be dealt with accordingly,'' Naros snapped.
''Oh this is where I get to say you were wrong in your assumptions,'' sparked the Doctor, stepping back slightly. ''I'm not a boy. Not a man. I'm not even human. I'm a Time Lord!''
The pitch of the sonic screwdriver had reached its peak. In the gap in the discussion, the noise became obviously apparent. While the carbon-copy of Cole began to collapse in on itself into Naros' smoke-form, the Doctor's hand launched out of his pocket and up into the air. He grabbed a tight hold of Amy's hand and the sonic screwdriver ignited with a stunning green gleam.
Everything around the Doctor and Amy became hazy and distorted like they were losing consciousness. Their surroundings swirled into pitch blackness and remained as such while their dizziness washed away. The Doctor buzzed the sonic again and the room was swamped in light. They were in the lobby.
''How did you do that?'' Amy awed, her voice echoing and bouncing from wall to wall.
''It's definitely him,'' stated the Doctor. ''He came from the other dimension. Which means there's a dimensional transporter somewhere nearby; wherever his ship is. It's not strong enough to take him home but it's got enough power to transport us.
''With a little tweaking,'' he added, spinning the screwdriver around his fingers and putting it back in his pocket like a pistol.
''He didn't say anything about another dimension until after you started using the sonic,'' Amy pointed out, wondering how the Doctor knew what to do.
''Yes, well, I was hoping something would come up that I could use the sonic on,'' guffawed the Doctor.
''Well never,'' said Amy exasperatedly keeling over, ''do it again.''
''I take you across the stars in a little wooden blue box and you tell me to go faster, but if I skip a few staircases you're on the verge of throwing up.''
Amy collected herself but quickly fell apart again, dissolving into a fit of giggles.
''What now?'' said the Doctor, trying not to smile. Amy tried to speak through her laughter but could only muster pointing at the Doctor's head.
''You just had a showdown with an alien murderer,'' she sniggered, ''wearing earmuffs.''
The Doctor looked a little embarrassed but coolly turned it into smugness.
''Well then he must think I'm the coolest opponent ever,'' he said. ''Which reminds me… snooping's over.''
He took off the flippant hat and Amy did the same, swallowing her laughter.
''It's time for some opposing,'' exclaimed the Doctor with a spark in his eye.