It was one of those evenings when Olivia and Peter knew that they would be up all night looking through files. John had been kind enough to offer the space of his and Sherlock's apartment so that they could spread out on the kitchen table, though Sherlock was more than a little irritated when he had to clean up his latest experiment. So the two Americans had settled down, boxes stacked around them, and began to sift through folders and papers as John updated his blog. Sherlock had once again lapsed into silent thought, chin resting on steepled fingers as he stared into space. The only sound was the rustle of papers and quiet clattering of John's fingers on his keyboard.

When an hour had passed and they were nowhere close to being even halfway done, Peter resigned himself to the fact that they would be there for the long haul. Setting down a stack of papers, he looked over at John.

"Hey, John. Got any beer?"

The doctor didn't even look away from his laptop screen.

"Nope, just tea."

Halfway up from his seat, Peter froze, his eyebrows raised in disbelief as he looked at John.

"What?"

John grinned, still typing away.

"Sorry, couldn't help it. Yeah, there should be some bottles somewhere in the fridge."

Olivia glanced up from her file, grinning, as Peter strode over to the fridge and opened the door, shaking his head at British humor.

"You know, sometimes you guys– holy shit!"

John looked over and Olivia was halfway out of her seat before they saw what had caused Peter to swear: sitting on a shelf in the fridge, directly at Peter's eye level, was a disembodied head. Peter, who had taken a huge step back, looked back at the two roommates.

"Really? A corpse head in your fridge? I thought I was through with that kind of thing when I left Walter's lab."

Sherlock, still lost in thought, didn't reply or even seem to notice Peter's consternation. John, however, just shrugged.

"One of Sherlock's studies." He paused, then frowned. "Your father kept heads in your fridge?"

Peter snagged two bottles of beer and shut the fridge door. As he sat down again at the table, setting one in front of his partner, Olivia replied, "You should see what Walter keeps in his lab." She nodded her thanks to Peter, then added, "Peter almost ate an ear in an omelet once."

John raised his eyebrows.

"A human ear?"

Peter nodded, popping off the two bottle caps with an opener. "Apparently, omelets are perfect incubators for ears."