Hello! I'm back writing human or slightly human fanfiction. This is my first attempt at a Harry Potter story, even if it is a crossover. Also I'm not completely sure about the time line with Lab Rats or Harry Potter, so bare with me. That's the end of this author's note, please remember to leave a review. Thank you!

Disclaimer: I don't own Harry Potter, I wish I did. Harry Potter belongs to J.K. Rowling. Neither do I own Lab Rats or Danny and Breana Davenport. They belong to disney and my good friend, LabRatsWhore.

It has been a half of year since Donald Davenport let his former deranged, evil scientist younger brother live with him and his family. Even if that family consists of Donald's brother's three children and his own biological children from a previous marriage. On top of the half of year it's been a few months since the world knew that Donald's adopted children; Adam, Bree and Chase were bionic humans. And the defeat of the crazed, pychopath Victor Crane as well as the downfall of Agent Graham and meet the President of the United States. Now that everything seemed peaceful, everyone other than the teens were contempt with how things were. Donald's step son Leo, his biological son and daughter; Daniel who prefer Danny and his younger twin Breana along with their siblings/cousins were restless. The six teens had a hunger for a adventure and danger. Something new and exciting. But they wasn't prepared when that new and exciting came ringing the Davenport mansion doorbell.

It was a normal or normal for the Davenport household fall day. Bree, Breana, Leo and Danny were on the couch in the living room watching a movie that they have seen a thousand times since things cooled down. When out of nowhere the large and long flat screen TV blew into pieces.

"Hahaha! You called that a throw! You're more weak than I thought!"

Leo narrowed his brown eyes at the goofy bionic. More brawn than brains. "Adam! We were watching a movie!"

Adam moved his childish brown eyes to Leo. "It wasn't me. It was Chasey over there!"

Chase glared at his brother. "Don't call me that!" He went to throw another plasma blast but put his arm down when the elevator to the lab opened and Donald and Douglas walked into the living room.

Donald stood by the kitchen island. "We heard all the racket from downstairs. What's going on?"

Breana rolled her pale green eyes. "Adam trying to make Chase his personal punching bag."

Danny groaned as he leaned back on the couch. "The usual."

Donald looked towards the direction of where the tv was and nearly blew a socket. "My million dollar tv!"

Everyone shrunk back as they knew a lecture about how important money is and such was coming when the doorbell rung.

"I'll get it!" Douglas called as he ran to the door. When he opened the door he was greeted by a caucasian man with slick black hair, dressed in a tailor suit and a navy blue tie. Douglas raised a eye brow. "How can I help you?"

The man nodded before pulling out a large yellow envelope. "Are you Mr. Davenport?"

Douglas narrowed his hazel-blue eyes. Before softing his gaze. He was feeling paranoid after all Crane is not the only person he messed over by turning on the other side. But there are no regrets. Douglas shook his head before looking into the house, since there is no official records of him living him here there's only one Mr. Davenport the guy is talking about. "Donny, you're needed."

A few moments later Donald walked up to the door and instintly had a bad feeling in the pit of his stomach when he saw the man on the other side of the door. "Hi, how may I help you?"

The raven hair hair cleared his throat. "Are you Mr. Donald Royce Davenport?"

Donald gulped before slowly nodding his head. "That is I.." he shook his head before taking huge deep breathes. "Yes, that's me."

The man gave Donald the yellow envelope. "Documents from a Dayaa Edina Sliverheart."

Sweat clung to Donald's hair as he couldn't find it in him to respond. Douglas bid the man farewell before ushering his brother into the house. Douglas shut the door before focusing on his brother, his hands shaking as his eyes swelled with tears.

"Is he talking about Day-Day?"

"Big D, what's going on?" Leo asked as he and the others walked over. When the brothers didn't respond Leo took the envelope and opened it before reading the paper that was inside.

"Dear Mr. Davenport,

I sorry to inform you that your sister, Dayaa Edina Davenport Sliverheart has passed away. With you being the only family listed, you are now the guardian of her ten year old daughter, Remi Diasy Sliverheart..."

Leo stopped reading to look at Donald and Douglas to see them in tears. Tears began to fill his and the others eyes as they realised it all. For whatever reason they have not spoken to their sister in a long time, now she's dead and they will never get to reunite. Plus a girl is without a mother, it didn't come to anyone's mind that the girl's father wasn't mentioned.

Leo sniffed up some tears and looked at the mourning brothers. "The letter says she's in London."

Douglas wipped his eyes before looking at Donald. "I suppose we're moving back home."

Donald nodded before turning to the teens. "Kids, pack your things. We're moving to London."

The bionic teens shared a look before running off in different directions as Donald sighed.

"I'll go pack Tasha's luggage. Meet you at the base."

Douglas nodded, still shooken up about the information they received and the fact that they will be returning to their childhood home. This is going to be interesting.