This is my first Sanctuary, my first crossover fic, and will be my first multi-chapter fic, so be gentle with me. This entire story is dedicated to Jocelyn (queerandnerdy on tumblr) because she turned me on to this ship (it's Helen Magnus/Donna Noble, for anyone who is wondering), and to Seleana (frecklybobos on tumblr). I own nothing, not even the title (Jocelyn came up with it). Well then, allons-y!

A Noble Cause
The Prologue

Turkey club on rye bread with a bag of chips he stole from Kate's not-so-secret hiding space at the back of the cabinet. A normal, mundane, lunch for a normal, mundane, day. But that's always how it starts, right? The quiet before the storm, the silence before the bang. He should have known having no abnormal troubles, no paperwork, no feedings or breakouts or shipments was too good to be true. Because as soon as Henry Foss went to take the first bite of his deliciously crafted sandwich, his computer exploded with alarms, bells, whistles; anything to grab his attention.

He didn't even have enough time to roll his eyes. Within seconds he was at the computer, skimming through miles of code that only he could understand.

Except they didn't make any sense.

"Hey, what's going on?" a voice called, elevated but still moderately calm, from behind him. Henry turned slightly to see Will Zimmerman heading towards him. He nodded at the screen, attempting to find the words to put what his system was telling him in a simple manner.

"Uh, we've had a breach, but we haven't had a breach."

Will simply cocked an eyebrow.

"Look," Henry gestured towards the screen, where an obvious change was occurring in the main entrance of the castle they called home. "Something is breaking in without breaking in."

"Is it Druitt?"

"Nah, the EM shield is up. Plus, it never shows up like this on the scanner. This thing is like… glowing or something. Blipping in and out."

Will rubbed the back of his neck before allowing his hand to slap down on Henry's shoulder. So much for a free afternoon. He planned to beat the Big Guy in a few rounds of cards, win back the money he lost last free day, but that didn't seem likely now.

"I'll get the guns, you go tell Magnus."

Before Henry could interject, Will was out the door.

"But… I… damn."

Helen, as always, took the news as if someone had told her there was a guest knocking at the front door. However, for leverage, she accept the stun gun Will handed to her as she and her gang of abnormal-busters jogged through the halls, making the long journey back to the main hall.

They arrived just in time; they heard whatever it was before the saw it. A gust of wind hit them all; Henry shielded his face from the light that erupted from the middle of the room, his senses in overdrive. Will and Kate stood dumbfounded, unsure of what to make of the sight before them. Helen simply grinned.

With the introductory greeting of a vroosh, vroosh, a blue police box appeared and sat idly in the middle of their home.

…What?

"Lower your weapons," Magnus directed finally, her tone unreadable. Will turned his head to face her; her grin had died down to a small smile that assured him they weren't in danger.

"Do you mind telling us what's going on?" he asked, lowing his stun gun to his side. The other two members of the team silently followed.

"In due time," she replied, her eyes flicking over to him mischievously just as the doors to the peculiar box swung open.

Out stepped a tall, gangly, man dressed in a pair of brown pinstripe pants, probably belonging to a suit, and a blue button down shirt. He was soaked, from his floppy hair to his red Chuck Taylor's, and Will could think nothing but 'so that's what a wet rat looks like.'

Helen stepped forward, all traces of her smile vanished as she watched the obviously distraught intruder reveal himself. Well, maybe it wasn't obvious. He was a profiler, things like emotions were easy to pick up on for him. But the man's face, contorted into one of the saddest expressions he'd ever seen, was a dead giveaway. He didn't even know the guy and Will still had to drop his gaze, feeling sorry for the man.

"Doctor?" Helen spoke softly, her voice laced with concern. Typical Magnus, overlooking things like breaking in and giving the team a heart attack just become someone was sporting a jutting lower lip.

"Helen, hi," the man, this Doctor fellow, replied. He didn't bother to introduce himself, he didn't even flick his gaze over the team. His eyes, so dark and cold; filled with pain and sadness, stayed locked on Magnus.

"I… I need your help."

A/N: So, what did you think? I promise it will get more eventful in the next chapter; this was just setting the story in motion. Reviews are nice ;]