It didn't make any sense.

On the outside, it was an ordinary 1960's British police box. But, as Batman sat in front of his Batcomputer and studied the readings blazing across the monitor like a multicolored tidal wave, he could see it was anything but.

He swiveled around in his chair to get a better look. He had attached sensors of all kinds to the blue box, with hundreds of wires running to the various machines around it. They all said the same thing in different ways; whatever was inside had immeasurable power. And no matter how hard he tried, the police box remained locked and closed.

"What are you?" He wondered aloud.

Batman kept his focus on the blue box even as someone stepped out from behind it. The figure was in his early twenties, wearing a black mask over his eyes and a black-and-blue costume.

"Whatever this thing is, it got past our security pretty easily." Nightwing stated, leaning over and knocking against the wood with his fist. "Maybe we should upgrade it."

"It didn't get in through any of the entrances." Batman explained, still staring at it with the same analytical wonder. "It just…appeared here."

He swiveled back around to the Batcomputer and opened up the Batcave's security footage. A grainy black-and-white video soon popped up, a recording of the blue box slowly appearing out of thin air on the walkway.

"So it's not just a telephone booth." Nightwing whistled, walking up to the chair's shoulder.

"It's not." Batman grunted. "And I'm no closer to finding out what it is."

"Maybe we're asking the wrong question." Nightwing shrugged, still studying the footage as the man and the woman came out of the police box. "Maybe it's not what it is, but rather, who are they?"

"That's what I intend to find out." Batman answered, pulling on his cowl as he stood up from his seat.

"Play nice in there!" Nightwing called out, cupped hand hiding a smile. When Batman had walked out of sight, the young hero crouched over the keyboard and turned on the holding cell security cameras.

"Oh, this is going to be good."

…

…

…

There came times when Arkham wasn't enough. Always temporarily, there came times when Batman would use these holding cells to imprison people in special circumstances, whether they were under some new disease that needed to be studied, had powers that would need a specialized cell in the asylum…or intruded into the Batcave.

It was a simple design, a short, white hallway with seven cells, three on each side with a seventh at the end of the room. Instead of bars, each cell kept their prisoner shut in by a sealed door of bulletproof glass.

Glass that the man in the bowtie was now throwing himself against in a desperate attempt to get out. His companion noticed Batman just before the man in the bowtie did. As soon as he realized his captor was present, the man stopped tackling the glass and composed himself.

"So, come back to punch me in the jaw again, eh?" He smiled, pressing his hands and face against the cell door. "Well too bad! Now there's a layer of really, REALLY hard glass between us."

As the man in the bowtie stopped to rub his shoulder in pain, Batman asked, "Who are you?"

"I told you," He responded with a grin, "I'm the Doctor."

"Doctor who?"

"Just the Doctor."

A codename. So Gotham had yet another crazy supervillain to contend with. From his accent, Batman could tell he was British, as was his ginger-haired companion.

"Now would you mind letting us out, you costume-wearing freak?" The red headed one in the miniskirt snapped from the cell across from the Doctor's.

"Now Amy, it isn't nice to call people names." The Doctor lectured her.

"Well look at him!" Amy gestured. "He looks like a kid on Halloween!"

Batman ignored her and turned back to the Doctor. "Why are you here?"

"Oh, Amy and I travel around, looking to go on adventures and have some fun here and there." The Doctor explained as casually as if he was talking to a friend. Despite his situation, he still stood tall and relaxed.

"And you decided to have an adventure in my cave?"

"Well, the TARDIS is a bit difficult to fly at times." The man in the bowtie grimaced, rubbing the back of his neck.

"So that's what you call your police box."

"Yes, and I do hope you've been taking care of her. Now," The Doctor rubbed his hands, "When are you going to release us?"

"After you answer my questions." Batman answered, glaring at him. "I'm not going to let you back on the streets of Gotham without knowing if I'd have to catch you mugging innocent people."

But he already knew. That gleam of insanity in the Doctor's eyes that he had seen a million times more in another's…this man would be just like him. He even carried himself in the same way, standing confidently when he was still and shaking his limbs around when he was talking.

He had thought he'd been rid of the Joker; and yet here he was, standing in front of him in an entirely new form.

"Fair enough." The Doctor shrugged. "Could I at least have my sonic screwdriver back?"

Batman pulled out the silver device from his utility belt and stared at it while he spoke.

"This sonic screwdriver…it uses sonic waves to interact with objects."

"Yes, I'm well aware of what it does…"

"Something we're years away from creating." Batman cut him off. "How did you get your hands on this technology?"

"You don't have one?" The Doctor raised an eyebrow, surprised. "The man with the secret cave lair, a car, and a supercomputer doesn't have a sonic?"

Batman glared at him. "Stop playing games."

"You apparently don't have any fun either."

He was stalling.

"Alright, we're ready." The redhead behind Batman whispered. Turning around, the caped crusader caught of glimpse of her closing a cellphone before she could hide it.

"Where did you—."

The cell doors opened all at once. The redhead dodged to the side just as the Doctor jumped out from his cell and shoved Batman into her cell. As he fell to the ground, she managed to grab the sonic screwdriver from his hand before running out. With the fury of a panther, Batman spun and leaped at the two just as the cell door closed again, his fist bouncing off the glass.

He was trapped in his own prison.

The Doctor yanked the phone from Amy's hand and shouted, "Good job Rory! Didn't know you had it in you!"

Rory? There was another one?

"Doctor, we need to go." Amy shook his arm.

"Good idea."

The two ran out the door, leaving the caped crusader alone in his cell. Punching the glass in a rage, he seethed through the humiliation to realize what he now had to do. Whoever this Doctor was, whatever his goals were, wherever he got his technology…

He had to be stopped.