To Elise: We apologize for the problem with the tenses, as we're two people writing we might not notice when we change the verb tenses. We're trying to be more careful, but if we keep it on just say it.

Disclaimer: We don't own the Avengers, or Supernatural, or Sherlock, or Doctor Who. Just the plot.

He likes to make people pay for their actions, that had stung the Doctor more than he let on; what if the Trickster tried to make him pay for destroying his own planet? He shook his head; there was no way the Trickster would know that. But then again, the guy knew River's real name and only he, Amy, Rory and River knew it.

"We're here." Bruce said, walking to the plane's exit.

The others from the team followed, the tension around them was palpable and even though no one wanted to show, they were all terrified of what was awaiting for them.

John gulped, it was the first time he was apart from Sherlock since the latter's "resurrection". He took a deep breath and followed the Doctor and Professor Song as they exited. The Spring Field University looked empty from the outside, which John supposed it actually was for the Trickster was waiting for them.

The Doctor paused in front of the university's front door, "Am I the only one who feels a bit sick because if I am I might have to go to the doctor's."

"Probably just your period, my love" said River as she passed through her wife and entered the university without hesitation.

The Doctor followed her after a long pause, probably considering him, erm, her being on her period.

John simply chuckled at the, now woman, the Doctor was really one of a kind. John thought it was nice having her and River around during this mission, with their petty fights they seemed to make the situation lighter.

When they first came in everything seemed normal, for an empty university anyway, but the moment the door shut behind John, the last one to come in, their surrounding changed.

All of them were in the a massive hall, there were loads of people there, mostly kids from 11 to 17 years old, but there were a few adults too. It seemed like a school that was taught in a giant church from what John guessed by the architecture.

The kids were divided in four tables and the kids from the same table were ties of the same color. One was yellow and black, another was blue and bronze, there was one green and silver and the last was red and gold.

"Where are we?" Bruce asked wide-eyed, as if he knew the answer and didn't like it.

"Hogwarts." River smiled dreamingly, her eyes shining.

"You've got to be kidding me." John exclaimed in disbelief.

"Why would he bring us to Hogwarts?" Bruce asked, also in disbelief.

"I don't know, all I want is to be sorted!" said the Doctor happily. "Oh, which year are we in?! Is Harry still going to the school?! Or are we going to find out what happens after he leaves?! Will we see his children?! Argh, I'm fangirling! Is this a side effect, River?"

"Of what? Being the Doctor? Of course it is, sweetie." River replied and the Doctor stuck her tongue out. John chuckled, yes, those two were definitely married.

However, Bruce seemed to notice more important things, like the fact that everyone was staring at them. Including Snape, which Bruce found out the hard way, had an intense and terrifying glare. And that's was the man was doing.

The Doctor had other plans though, "Daleks bite me! That's Severus Snape! Snape! River! Severus Snape is glaring at me, such an honor. Before the war then." River rolled her eyes, but smiled at her wife's antics, "I need to meet him River!"

The Doctor took off in the direction of the teachers' table. Most of the teachers were paralyzed, John guessed that it was either from strangers showing up out of nowhere, or for the fact that a woman was excited and wanted to meet Snape.

The Doctor jumped on the professor's table and started shaking Professor's Snape hand "An honor to meet you, Professor. You're such a great man, I never thought I'd be able to meet you, but look at us! I can't believe it! River! I'm talking to Severus Snape! Ha, I'm starting to actually like this Trickster!" The woman rambled. She had a big grin on her face, which was scaring everyone in the room. And she wouldn't let go of Snape's hand.

The man was obviously in shock too, but in matter of seconds he recovered and asked, "Would you… kindly…release my hand… Ms.?"

"The Doctor, just the Doctor." The woman said releasing the man's hand, but kept grinning.

"May I ask who are you and how did you pop up on my school?" Spoke the old man with a long white beard.

The Doctor widened her eyes and ran to Dumbledore, shaking his hand. "Old wise man, I'm so glad to meet you. I don't know how we ended up here; it was the Trickster's fault. Oh, you alive! That's good, we're not in war times. But look at your hand! Oh, c'mon, why sixth year?! Couldn't it be fourth? It's my favorite! Anyway, I'm the Doctor, this are my friends John Watson, Bruce Banner and my wife, Professor River Song." The Doctor had a huge smile on his face. She certainly had just seen her dream come true.

River stepped closer to the head table, "Sweetie, I think you might be scaring them."

"You think?" John hissed sarcastically.

River ignored him and kept going, "Headmaster, it might seem a little bit crazy, but we were sent here accidently by a person named the Trickster."

"And we would love to be sorted because I've been dreaming of this forever!" The Doctor added still shaking the elder man's hand.

"I beg your pardon?" The old man frowned.

"We were following the track of a Trickster and it seems he's just sent us here. And I'm really sorry for our hyperactive friends." Bruce tried taking control of the situation.

"I'm not hyperactive, I'm just excited." The Doctor pouted.

"You can keep lying to yourself if it makes you better." John said under his breath, too used to Sherlock acting the same way. That only made the Doctor glare at him.

"So you are not wizards?" asked Mrs. Sprout.

"No, we are not, my fine lady, but I can't help asking for the Headmaster to allow me and my friends to try on the Sorting Hat. You see, it's been a dream of mine for a long time, hundreds of years if you were wondering." The Doctor said politely, and even though Dumbledore felt suspicious, he couldn't help but believe the woman's words.

"Hundreds of years?" Inquired Snape suspiciously.

River interrupted her wife, "My wife is an alien from a planet very far from here and she heard stories about a magical school on Earth called Hogwarts, so she dreamed about being sorted into one of the Houses."

"Alien?" Professor Flitwick asked disbelievingly.

"The Hat could tell you if River was lying when it checks me out!" The Doctor said immediately, the she blushed, "Not that way, I meant, you all understood what I meant!"

The teachers looked at each other and Dumbledore nodded at them before turning to the now guests. "Only if you provide us with a bit of information about yourselves, you see my dears, we have…"

"To check if you're not spies, or mean harm to the kids, or psychopaths?" John completed raising an eyebrow.

"Yes." Dumbledore answered solemnly.

"Deal." Bruce said, now even he was kind of excited. He might be an adult, but heck, they were in Hogwarts! Even an alien of God knows how many years old was excited!

The Doctor was obviously the first in line to be sorted and everyone noticed she was disappointed when she was sorted into Hufflepuff. She was hoping to be sorted into Gryffindor, as he wanted to meet the so famous Harry Potter.

Either way, she convinced Dumbledore and the other teachers to let her sit at the Hufflepuff table. The students were very curious about her, so she was very entertained for the night.

River had the biggest grin when she got sorted into Slytherin. No one ever doubted her aptitude for the house.

The Slytherins were also curious about the new guests, so River had a real good time making jokes and telling incredible stories to them (mainly about the day she killed the Doctor).

Bruce, well, he tried to act cool, but he was pretty sure his excitement was showing because scientifically everything around them shouldn't even exist. Those people in front of him? Stories! So when the Hat was placed on his head and declared he belonged to Ravenclaw, he was trying hard for the Hulk not to show up because his heart was beating faster than it should.

John walked to the stool thinking he would be in Hufflepuff, that's what Molly told him once, that he was so very loyal and that he would be in Hufflepuff in a heartbeat.

Molly was wrong, he went to Gryffindor after five seconds with the Hat on his head.

The four visitors were so impressed by the castle and the idea that magic could actually be real that they forgot about their real mission. The Trickster was miles away from their thoughts.

After a night on the castle talking to the students and professors. After curfew, the Avengers found themselves side by side at the outside of the school.

"How did we even end up here?" Asked John, feeling amazed.

"All I know is that I don't wanna ever leave." River had a small smile on her face. She seemed distracted.

"Who said we are leaving?" Bruce exclaimed looking outraged. "This place is a dream! Maybe we could become teachers or something." The man had a maniac smile, as if he was a crazy scientist who had the greatest idea of the millennia.

"Well, what if we don't?" Suggested River.

"I wouldn't complain." Said the Doctor, excited by the idea.

"So we stay?" John asked hopefully.

"Yes, we do." Bruce smiled and they all walked back into the castle.

And whoever heard about the Casino Lotus just had a heart attack.

So, what do ya think? We wanted to do something like Tv land from Changing Channels, so we just thought "why not send them to Hogwarts?"