"I'm Amethyst," I told him, eyeing him in disbelief.

He was wearing his brown pinstriped suit and long overcoat, his hair a trademark mess, and a bemused smirk on his face.

"Amethyst? I've been to your planet! Well, not your planet, but the Amethyst Planet. It is in the same quadrant as Midnight," he rushed, "Midnight is a planet made entirely—"

"Out of diamonds. Yes, I know."

"Do you?" he asked, shocked. "Where are you from?"

He pulled a small device from his pocket and began to scan me.

"Is that your sonic screwdriver? You really take your roles seriously. Did you steal a prop replica of the TARDIS, too?"

He immediately stopped scanning me and gave me a hard look.

"Who are you? Where are you from? And how do you know about my TARDIS?"

"I told you, I'm Amethyst... I'm nobody. I'm from America. And I am pretty sure everybody in this city knows about your TARDIS."

"I don't believe you," he said, childishly crossing his arms.

Unable to resist I rolled my eyes.

"What did you do to those… things?" I asked, looking down at the piles of ash near my feet.

"Like you don't know. I used salt. It dries them out."

He held out a handful of table salt.

"Okaaay… What were they?"

"They are called the Ibachi, they're basically an intergalactic pest who somehow found their way to Earth," he explained. "How do you know about my screwdriver and TARDIS, but not know about the Ibachi?"

"They haven't been on the show."

"What—"

A loud growling from our right interrupted his questioning. An Ibachi rounded the street corner, and I quickly started backing away. Without hesitating, the self-proclaimed Doctor tossed his handful of salt at the creature, turning it to ash.

"You didn't try to reason with it," I noted.

"It is a pest; practically a murderous cockroach. You can't reason with it. Now, I need to get back to the TARDIS to see what is going on here, and you are coming with me."

"Alright."

"Alright? You aren't going to argue with me?"

"Are you kidding me? I don't care if you really are just plain old David Tennant and happened to have lost your mind, I'll follow you anywhere."

"I think you are right about one of us being crazy, but my bet is on the girl swearing to follow a stranger," he told me.

"I just watched my idol save me from a killer gigantic frog beast with a handful of table salt hours after deciding to admit myself to the psych ward… I'm not going to argue about my sanity. I know I've lost it, but I am going to enjoy every wandering second of it."

Before he could respond, a group of ten snarling Ibachi turned onto our street.

"I don't suppose you have enough salt for them, do you?" I asked.

"Uh, no. Run!"

He reached out and grabbed my hand before taking off in the opposite direction of the creatures.

"Always with the running," I muttered, incapable of holding back.

The Ibachi had spotted us and were quickly gaining.

"Through here," he shouted, giving my arm a tug and heading down a dark alley.

We ran between the buildings with the Ibachi close on our heels. At the end of the alley there was a ten-foot chain fence blocking our path.

"We're trapped!" I shouted.

"No. This way." He pulled back a corner of unattached fence, signaling me to go first.

I quickly struggled my way through, with him closely following.

When we rounded the next corner I let out a loud gasp. It was right in front of us.

The TARDIS.

"Come on," he urged, opening the door to the police box.

"Alright, but it's going to be a bit cramped in there. Not that I mind," I added with a wink.

I stepped inside the box and my heart stopped. It wasn't the tiny wooden set piece I had anticipated. I was standing inside the actual TARDIS control room. It was gold, and green, and glowing!

"It's… bigger… on the inside," I stumbled.

"I thought you knew all about my TARDIS?"

"No, I mean, it is actually bigger on the inside! What is going on?" I demanded. "Oh, God… I've actually lost it. Or maybe I died… got hit by a trolley this afternoon."

"You are not dead, I assure you. This is real. Now, can you explain to me how you seem to be completely human, and yet know about Midnight, my sonic screwdriver, and the TARDIS?"

"I learned everything from your show. You know, the one starring David Tennant. Doesn't that name ring a bell at all?"

"No. What show, and who is this David person?" he asked.

"Oh for goodness sake! This is David Tennant, he, " I emphasize staring at him, "plays the Doctor on Doctor Who."

I pull out my cell phone and unlock it to show him the background. It's a Doctor Who promotional shot of Tennant.

"That's me!" he says, surprised.

"I know."

"No, I mean that is me… but it isn't. Where did you get that?"

I threw my arms up in frustration.

"I told you it's from Doctor Who. The television show all about the Doctor who travels through time and space in his TARDIS, with his companions, saving the universe."

"Television show? Stay here!" he commands turning to exit the TARDIS.

Can this be real?

I approached the TARDIS console and lovingly caressed the controls.

It feels real.

"Don't touch those!"

I jumped and backed away from the controls as he reentered the police box.

"Right, well, I've figured out what has happened… sort of."

"And?" I asked, extremely curious.

"I, and probably the Ibachi, seemed to have been sucked through a door between parallel universes. In your universe I am just a fictional television character, and in mine, all of this," he gestured the TARDIS control room, "is real."

"Don't you dare get my hopes up!" I demanded, pointing at him. "I have been dreaming, and wishing for something like… this to happen for as long as I can remember. So when you say this is real, you better be telling the truth."

He studied me intently, his face serious.

"I swear to you, everything I just said is true. If you would like to stick around and help me find my way back through, to my universe, I'm sure you'll see along the way I'm not lying."

It took no time for me to decide.

"Yes. I'll help. Of course I'll help," I told him, and then added for myself, "Like I could walk away from even the chance of this being real."

Something began banging on the door of the TARDIS.

"That would be the Ibachi. We should probably move somewhere a bit safer," the Tennant look-alike said, sauntering over to the controls.

He started flipping switches and twisting levers, and I heard it, that familiar engine whooshing sound. The whole room lurched, and I barely caught myself on a railing.

When we came to a stop he offered me his arm, and led me outside.

We were parked in the glow of the London Eye, miles away from where we had just been.

"You're him," I whispered breathlessly, as I looked around. "You're the Doctor!"

I looked up and found him smiling cheekily down at me.

"So I am."