A/N: This started with my husband coming up with a crossover idea as a joke, and teasing me about my love for Sherlock and Loki. And of course feeling the need to prove that it could be done, this is the result. So please let me know what you think (also be gentle about all the Marvel stuff, I'm limited on my knowledge!)

St. Bart's Hospital, Pathology Lab

"Molly are you in here?" Mike Stamford asked poking his head into the lab.

"Just a second Mike!" she called from her office. She quickly finished the form she was on and walked out to meet him.

"Sorry, I was just catching up on some paper…" she trailed off as she realized there was someone else with him.

"Ah Molly, let me introduce you to your newest recruit," he said gesturing to his companion. "He'll be spending his residency here under you."

Molly's eyes flicked over the man in front of her appreciatively. He was quite attractive, tall, well dressed, his black hair slicked back, slightly curling at the ends.

She caught his smirk as he noticed her eying him. She smiled sheepishly at being caught and held out her hand, "Pleasure to meet you. I'm Dr. Molly Hooper, head of the Pathology department."

He smiled and raised her hand to his lips, "The pleasure if all mine Dr. Hooper," he intoned smoothly.

Molly raised her eyebrows at at the gesture, but smiled, "Call me Molly, Dr. Hooper is far too formal."

He smirked, "Very well Molly," she blushed as her name rolled of his tongue.

"You may call me Loki."

"Well I'll just leave the two of you to get acquainted shall I?" Mike said not too subtly. Before Molly could protest he was already out of the lab.

She sighed and rolled her eyes. Mike meant well, he was hoping that she'd find someone to take her mind off Sherlock.

Loki raised his eyebrows at the look of fond exasperation on the pathologist's face. Molly waved her hands dismissively,"Never mind, it doesn't matter. So what exactly brings the god of mischief to St. Bart's?" her face betraying nothing.

Loki's eyes widened in surprise at her question, of all the things he had expected her to say that was not one of them. He smiled and moved closer to the pathologist, "I see my reputation has preceded me," he purred. She flushed as she attempted to suppress a shiver as her body reacted to his proximity and voice.

"I have my sources," she said in a clipped tone, folding her arms across her chest. "So I'll ask again, what brings you here Loki?"

"An item of potentially dangerous power has been reported missing. My companion and I have been tasked with it's retrieval," he stated in a bored tone, glancing idly at his fingernails.

Molly nodded, "So you're here with a cover story in order to have access to a hospital with a lab."

Loki inclined his head, "We're not exactly sure on the details of what kind of dangers this item could pose, and need a place to safely research it and it's potential location."

Molly rubbed her temples frantically trying to keep a headache at bay. "So what you're telling me is that there's an item missing but you don't know what it does, or where it's being held. Do you even know who has it?"

Loki shook his head and sighed, "That's the problem, we weren't even aware of this item's existence until recently. From it's description the potential power it holds is similar to that of the Tesseract." He paused, looking askance at Molly who nodded and gestured for him to continue.

"But it appears to be in the experimental stages and is therefore more volatile. We need to find all the information we can about the creation of this object, who might have known about it and it's purpose."

"Alright," Molly agreed. "When do we start?"