Disclaimer: I definitely don't Doctor Who or Harry Potter. If I did, I don't think I would be writing for free.
Prologue
TARA was exhausted. She had been up for almost forty-eight hours working on a new potion. It was fiddly as hell and required constant attention. She had just finished it minutes before, another potion that would change the world. That's what Tara did. She was a Potions expert and Surgical Healer for the Dublin branch of St. Mungo's Hospital for Magical Maladies and Injuries.
The potion she had just finished would be used to immunize people against the bite of vampires. She admitted to herself that this was one of her more brilliant pieces of work. Not quite as brilliant, though, as her achievement two months ago. That was when she had discovered a cure for lycanthropy. Her recent successes managed to get her permanent resident status and a huge estate in Roscommon. Ever the workaholic, she turned part of her home into a top-notch research facility.
Tara snapped out of her musings and found that she had wandered into her media room. She had intended to go straight to bed, but this was even better. Yes, she was tired, but she was also rather wound up from drinking too much coffee. Perhaps a couple episodes of Doctor Who would help her to unwind. She quickly found her favorite season two episode and settled into her comfy chair. She soon fell asleep to the sound of The Doctor's voice.
MEANWHILE ON THE TARDIS….
The Doctor was frantic. Alarms were blaring, the ship was shaking, and the TARDIS was out of control. Rose was on the floor, trying to get to one of the battered jump seats. Jack was hanging onto one of the coral struts for dear life. As for The Doctor, the TARDIS was doing her best to keep him away from the console. There was something she needed to show him, and she didn't want him interfering with the controls.
The Doctor tried reaching for the stabiliser one more time. "Come on old girl! You're going to smash us all to pieces!" Another violent shake sent Rose flying into the Time Lord. The Doctor couldn't help but smile at his pink and yellow (and now black and blue) human. "Well, hello. Fancy running into you here!"
Rose grinned back, despite the situation at hand. "Hello yourself, Doctor." She noticed that he hadn't tried to move her off of him yet. Unfortunately, Jack picked that exact moment to point out that they had landed.
Jack helped Rose up, and The Doctor sprang to his feet. Cautiously, he made his way to the door, Rose and Jack following close behind. He opened the door, not knowing what he would find. They expected maybe Cybermen, Daleks, or alien soldiers. They didn't, however, expect a shocked young woman pointing a polished stick at them. The last thing they remembered was red beam of light headed straight for them.