They agreed to take a taxi to the town that was nearest to their destination and then walk up the hills to get to the labs. ("See, I even make sure you get to hike, just like you planned!" – "Oh, do shup up, Sherlock") That way nobody would see a car taking them directly to the laboratory, so people wouldn't remember them or get suspicious.
Getting into the building was fairly easy and uneventful – with Q hacking all codes and Sherlock picking all locks that were unfortunate enough to come into their way. Combined, they were unbeatable – of course, neither would ever admit to being a good team but they both knew it (very-very) deep down.
Once inside, Q put the security cameras on loop to only show the empty hallways and they promptly proceeded to the room they knew the incriminating documents would be found in. Those doctors must have thought it safer to write their findings on paper rather than type them into the computer – maybe for fear of being hacked, just like it had eventually happened now. They of course weren't subtle enough about it, and the two younger Holmes brothers could easily read between the lines in the downloaded e-mails and reports to find out where the papers were being kept.
They also knew the two weekend-guards' schedules and routes so they didn't have to fear getting caught.
They were just about to leave with the files safely tucked away in Q's backpack ("At least it's useful for something." – "Just be careful with what you put in, I've got my camera in there!") when they heard voices from just outside the door, which indicated people nearing.
"What the hell? They not supposed to come this way for another half an hour!" – exclaimed Q worriedly.
"Are you sure you downloaded the right schedule for the guards' rounds?"
"Are you insinuating I don't know what I'm doing?" – asked Q indignantly, probably a little louder than he should have, given the circumstances.
"Don't you get snappy now! They'll hear us!" – warned Sherlock, while tugging Q along with his backpack to hide behind a big desk by the wall, just out of view of anyone who might look inside. It was fortunate they were both so skinny, otherwise they would surely not have fit there. Even like this, it was very uncomfortable being squeezed into that gap. Sherlock had to bend comically, for he was really tall. Q at least had an advantage there, being as small as he was.
"They're still there. I can't understand what they're talking about, but they're definitely near…"
"Yes, and also, I think there must be more people than just two guards out there..."
"I really don't understand it. It was clear as day: two guards, taking turns with their rounds, every two hours each, beginning with the east wing heading to the west. This isn't right!" – whispered Q confused.
Just then, the door opened and five people walked in. Sherlock and Q could not see from their position but it was clear these weren't the guards. Two men were doctors in lab coats and three others (two men and a woman) had expensive suits/costume on and looked like serious business people.
All five of them stopped by the door and the three suited visitors looked around the room with keen interest. Luckily none of them shoved sign of wanting to go anywhere near the intruders' hiding place to check the desk with the computer on it; they seemed to be interested in the room in general instead. Q and Sherlock could watch them through the holes that were made in the desk for leading out different wires and cables.
As they were watching, one of the doctors turned to the inspectors: "And this my lady and gentlemen, is the office of the director of the whole institution. Doctor Mubarack has been leading our researches for over five years now, and as you all probably know, we have made great progress developing medicine during this time."
"It's very impressive indeed, Doctor Brody. I trust you can show us the rest of the building, too?"
"Of course, Miss Winters. We're going to walk through the whole laboratory with you now and you may ask as many questions as you wish. If you would all kindly follow us please… This way…" – and with that the party left the office, closing the door behind them.
Sherlock and Q released a breath they hadn't realized were holding the whole time. "Puh, that was close! Typical, we should choose the very same day to break in when they're parading around with VIP guests!"
"You do realize, little brother, that we can't get out now, don't you? Not with them walking around the whole building."
"Surely, they're going to leave soon…" – but Q didn't sound very convinced or hopeful.
"Of course, surely… But until then: do you have any suggestions what we could do to pass the time?" – Sherlock annoyingly didn't sound bothered about probably having to spend the rest of the day locked in an office, sitting in a small space behind a desk on the floor with a full-packed backpack and trying not to draw attention to themselves. Q couldn't decide whether he was annoyed about his brother's calmness with this whole ridiculous situation or amused to discover that the other obviously really didn't have anything better to do or anywhere else to be. That knowledge would be a super blackmail-material later when this nightmare will finally have ended. Until then, it was plain irritating, though.
"Well, seeing that it's all your fault we're here in the first place, it is just fair you should think of a way to keep me occupied and prevent me losing my mind because of boredom!"
"Oh, I have a few ideas…" – Sherlock was smirking and Q began wondering if he should get worried. Sherlock being mirthful usually meant trouble to any unfortunate person around him.