Bruce readied the man for a CT scan to check for any internal injuries. He slid the bed in and went over to the monitor hooked up to the machine. What he saw surprised him, to say the least.

Two hearts sat on opposite sides of the man's chest; one was beating. Banner narrowed his eyes, putting his glasses on, to make sure what he was seeing was real and not some hallucination. His mouth open, the scientist picked up his phone. He clicked the screen and it started ringing. He brought it up to his ear and soon enough, there was the man's voicemail.

"Hello, you've reached Tony Stark. Please don't leave a message," it droned on.

Ignoring that part, Banner said into the mic, "Tony, you have to come here right now. It's single handedly one of the most amazing things I have ever seen."

Only a minute later, Stark came crashing into the room, nearly tripping on a chair. "What? What is it?"

Bruce pointed at the monitor.

Tony cast a glance at Banner and looked up at it. His eyes widened and he brought the screen closer to his face. "Am. . . am I seeing this right?"

Bruce nodded. "Yep. Two hearts."

"That is amazing! Truly brilliant! But wait, only one is beating. Shouldn't both be?"

"I'm guessing. But how do you restart an alien heart?"

"Probably just like a regular person's, maybe." Tony brought the man out of the machine and interlocked his fingers, then placed his fists on the man's chest (which was still shirtless). He glanced at Banner, an eyebrow raised.

Bruce shrugged. "Go for it."

Satisfied, Stark bright his hands up and then smashed down on the alien's left heart. A sudden gasping could be heard, along with an "Ooh, that had to hurt," from the scientist. The unconscious man's eyes shot open and he sat up suddenly, gripping Tony's wrists in his hand.

Stark just stared, eyes wide. He then carefully tried to remove his hands from the alien's grip, but a quick tug from the man was enough to stop any attempt of that.

Meanwhile, Bruce had just sent out a signal, telling the other Avengers to come immediately. He then turned to the two men.

"Look, I know you must be very confused, but-"

"I am only slightly confused, thank you. Though I must admit, it was surprising when this guy pounded on my heart to get it working. Usually I'm awake when that happens," the man joked half-heartedly. He then released Tony's wrists and attempted to swing his feet of the small cot. He stood up and immediately fell over.

Banner felt his mouth drop. Not only did this alien speak English, but he had a British accent!

Tony looked just as surprised. He bent down and picked the alien up again, letting him lean on his shoulder for support. "So, um-"

"We came as fast as we could!" a voice shouted from the doorway. All three men looked at the door and saw the Avengers, led by the Captain, who had been the one to speak.

"What's going on in here?" Agent Romanoff inquired suspiciously. She placed her hands on her hips and raised an eyebrow at Bruce.

"Well hi there! You two didn't tell me you had company!" the alien exclaimed, grinning. He saw the look on Tony's face and it disappeared, replaced by a look of confusion. He glanced around and whispered into Stark's ear, "was it something I said?"

"Um, maybe more something you did," he replied. He then snuck a peek at Banner and motioned to the alien in his arms. Bruce seemed to realize this and helped get him back onto the bed.

"As you can see, he's awake," Banner said, shrugging slightly.

"Yes, I'm awake; how long have I been out exactly?" the alien asked.

"Nothing but a few hours," Stark told him.

"Ah."

"Oookkkaaaay," Steve started, "what have you found out?"

"He has two hearts," Banner said.

"Oh. Surprise surprise. We do have an alien on our hands," Agent Barton grumbled.

"Is he dangerous?" Thor asked.

"Doesn't seem so," Tony responded.

"I'm still in the room, thank you very much," the man snapped.

"Okay. Call Fury and tell him he's awake," Rogers ordered. Natasha quickly started talking to him over the intercom. She nodded, then looked up.

"He said 'cuff him and get him to an interrogation room,'" Romanoff relayed. "'Treat him as a threat.'"

The man seemed startled. "Wait, what did I do?"

In a matter of moments, the alien was cuffed by Steve and forced down the hall by arrow point (courtesy of Barton). He glanced around curiously.

"Hmm, where are we? 2012, definitely, and I hear engines; oh, we're on some sort of ship!" He grinned.

"How do you not know what year it is?" Natasha questioned as they walked.

"Hello~ alien, remember? Besides, I never do them in the right order." Before she could ask what he meant, he was shoved into a small interrogation room and cuffed to the small wooden table that was inside. The man pulled idly at the cuffs, but soon grew bored and waited in silence for someone to enter the room. After about five minutes, Director Fury and the gang walked in, surrounding him.

"Hi! Finally! I feel like I've been waiting for ages for someone to interrogate me!" he cried, leaning back in his chair as much as he could.

"If you would so kindly stop talking, we could get to the interrogation," Fury growled, placing his hands on the table.

"Okay," he sighed, holding up his hands in defeat, "okay. Continue."

Fury straightened up and put his hands behind his back. "Who are you?"

"I'm the Doctor."

"A doctor? You're an alien doctor?" Steve scoffed in disbelief.

"Well, yes, technically. In simple terms, yes, but I'm actually something much more important, than just a doctor," the man said. He then smirked slightly. "I'm the Doctor."

"So, Doctor, just what exactly are you?" Fury questioned.

"Oh wouldn't you like to know."

Suddenly, a powerful electric shock ran through him, making him jump in his chair. The Doctor took a deep breath and then studied the room in less than a second. There was a small wire running up the leg of the table, connecting to the metal underside of it, which in turn was touching the cuff.

"If you don't answer my question, you'll get much more than just a few measly volts," Director Fury threatened.

"Okay. But only if I get something informative from you," the Doctor said.

"An what would that be?"

"Where am I, exactly?"

"You're on our helicarrier. I'm the director of a top secret agency called S.H.I.E.L.D. I'm Director Nick Fury. This is my team Steve Rogers, Tony Stark, Bruce Banner, Thor, Agent Barton, and Agent Romanoff," he said, motioning to each of them in turn. "Now, tell us what we need to know."

"Alright, can't argue with that," the Doctor muttered. "I'm a Time Lord from the planet Gallifrey in the constellation of Kasterborous."

"Gallifrey? I have never heard that name before. Surely this is just some sort of tomfoolery?" Thor denied, arms crossed.

"Sorry, but it's true." The Doctor shrugged.

"Then why aren't you there with your own people?" Tony Stark asked. The Time Lord's eyes grew slightly misty and he looked away.

"Tell us. Why come to our planet when you have your own?" Clint repeated.

"Because. . . because. . ." the Doctor seemed to lose his confident demeanor and he sunk down in the chair a bit.

"Wait, you guys, he obviously doesn't want to tell us. Maybe it's for a good reason," Banner suggested. He glanced around at the Avengers, who were looking uncertain.

"I'm not letting him go until I get an answer," Fury snapped.

This seemed to anger the Time Lord. "Oh really? Why should I have to answer you anyhow? I can go wherever I please in this universe, why shouldn't I come to Earth?"

"Because it's not your planet!" Director Fury lurched forward, planting his large hands firmly on the table, making it creak. The Doctor shot up in his chair.

"Well at least you still have a planet!"

Silence. Shocked silence. Nobody dared move an inch. The Time Lord choked, falling back into his seat and leaned back.

Director Fury coughed, shuffling. "Sorry."

"Whatever. You're right. I could go anywhere I wanted, but instead I choose Earth. Well, I didn't choose to be here this time, I kinda got blown up, but-"

"Wait, you got blown up?" Stark asked. He cocked an eyebrow.

"Yeah, unfortunately. I heard about the war that was going to happen between the Chitauri and someone else, so I went to go stop them. I save people, you know.

"Anyways, I was there attempting to put an end to the fighting-never liked fighting, ever. Hate weapons. That's why I use my sonic-wait, I don't have it."

"What, you mean this?" Stark asked, holding up the pen-like object.

The Doctor's eyes lit up with recognition. "That's it! Can I have it?" He held his hand out.

Tony glanced at the tool and shrugged, depositing it into the Time Lord's outstretched hand.

"Ahh, feels good to have it back. Thanks." He flipped it in his hand. "Back to my story." He cleared his throat. "So, the Chitauri ignored my warning and naturally, I had to stop them. I had found out how to cut off their power supply from the ship, when suddenly, there was this object soaring towards the ship. I instantly knew it was a bomb and ran back to my TARDIS."

"TARDIS?" Romanoff raised an eyebrow.

"That's the name of my ship," he said.

"What ship?" Steve asked.

"So I'm assuming you don't have her then. Pity. Really quite useful. And obvious if you had seen her."

"Wait, do you mean that Police Box?" Stark inquired, stepping forward.

"Oh, so you do have her. Good. I don't like not knowing where she is." The Doctor smiled.

"It's a she?" Thor asked.

"Of course she is! She's a ship, after all! All TARDIS's are girls.

"Now, stop interrupting the story. I ran back to the TARDIS, but, unfortunately, I was a bit slow; that Chitauri ship is huge, and I got caught in the blast. That's why I'm all banged up currently.

"I got inside my ship before the final explosion came, but the TARDIS wasn't so lucky. Thank goodness for force fields, am I right?

"We were sent spiraling out of control, where we passed through the portal. And wow, what a coincidence: Earth. Thank goodness that person bombed when they did, or else your planet would have been attacked!"

"Um, we were attacked. And. . . we were the ones who blew up the ship," Agent Romanoff admitted.

"Well, Stark was technically the one who flew into the portal to nuke the ships," Barton mentioned.

". . . Ah. I see," the Time Lord murmured.

"Sorry. But we had to stop the Chitauri," Tony said.

"Oh? No, of course you did. I wouldn't have done the same thing, mind you, as I'm one for peace. Survival of the fittest, right?" The Doctor shrugged. "And since I have your attention, there's two things I'd like right now."

Fury crossed his arms. "And what's that?"

"My TARDIS and to be uncuffed from this table."