AN: Hello! Soooo, this isn't my first story on fanfiction, I do have another account, but that one is mainly to write for Narnia so I made a new one! This is, however, my first Lab Rats story so I'm pretty excited! I thought up this idea a while ago and it took forever for me to convince myself to actually write it, so there's some aspects that might be a bit weird after the bionic smackdown episode, depending on what happens (I'm so excited!). So, if that happens, I'll just label this AU! Anyway, please enjoy and review if you can :D I love getting feedback whether it be good or bad because it improves my writing so send away! Okay, on to the story!

I don't own Lab Rats (sadness)

PROLOGUE: THE MAKING OF A VIRUS

"Adam look out!"

Chase spun on his heel at his sister's voice to catch his brother Adam barely duck a brutal punch. Diving forward, Chase was able to grab the man's fist, turning and using his momentum to send the man over his shoulder and crashing to the ground. When he was sure the man wasn't going to get up again, he turned to his siblings who had run over, Adam closest. The two brothers exchanged grins and fist bumps as Bree rolled her eyes good-naturedly.

"We still need to find the scientist, guys," Bree urged, grabbing both Adam and Chase's forearms and rushing them away from the site of the brawl. Chase dug his heels into the ground to pull himself to a stop, looking around himself and comparing what he was seeing to the schematics in his brain.

"I think our best bet would be the bunker about thirty yards from here; its close enough to the lab that the doctor might have run there for safety" he said, blinking as he processed exactly where to go. Chase turned to his sister. "The bunker is near the base of the mountain and the entrance is a small shack betw-"

Before Chase could finish giving the information, he had to gasp for breath as Bree rushed him and Adam to the exact hidden entrance he had just been in the process of explaining. Shrugging, Bree walked toward the entrance with Chase and Adam slowly following. Super-speeding with Bree always made them feel a bit off-center, not being as used to it as she was. Adam was usually quicker to regain his senses as was the case this time, quickly hurrying to walk in front of Bree. Chase shook his head and hurried to catch up, making sure to examine his surroundings for escape and anything to use should a battle take place. Noticing the lack of alternate exits, he bit his lip nervously. Let's just hope we can grab the scientist and get out without any other problems.

"Come on, mission leader, you have to go first" Adam teased, tearing Chase from his examination of the small bunker. Nodding, the smaller boy stepped forward and tested the wheel that activated the locks in the door. Locked, of course. "Adam could you…" he trailed off as he gestured to the wheel. His older brother understood and stepped up to the door, quickly making short work of the lock. Making sure both siblings were ready for whatever was behind the door, Chase turned to the object separating him from his goal and shoved it open before rushing into the room, arms up in preparation of a fight.

Two burly men rushed toward the three siblings and Chase made short work of the first with a well-placed kick to the chest followed by a quick punch to the skull, rendering the man unconscious. When finished with his rival, Chase turned to see Adam holding the other man off the ground just before smashing him back down. Chase winced at the impact but ran swiftly to Adam's side to ensure the man was indeed unconscious. Satisfied, Chase scanned the room for the scientist they were sent here for and found him cowering in a corner. The boy smirked and walked forward, feeling his siblings at his back as his leer sent the scientist into a quaking frenzy.

"Doctor, if you would just come with us" Chase requested politely, making a sweeping gesture with his arm to the open door. "I'm afraid you might be in a spot of trouble but I think you would do well to avoid a fight with us" he added, smirk growing as he noticed the doctor's eyes widening.

"Yeah dude, I could snap your little chicken arms faster than a chicken wing" Adam said somewhere behind Chase. The scientist in question stood on clearly shaky legs and Chase's smirk changed to a grin of victory as he reached his arm out for the doctor to take.

In the next second, Chase grunted as he hit the ground hard, his arm cradled against his chest. Looking up in confusion, he found Adam quickly kneeling next to him worriedly as Bree super-speeded back to her spot, holding up a syringe filled with a murky red substance. The youngest sibling was able to see the scientist also on his back a few feet away, clearly winded and more than a little confused. "Bree?" Chase asked in confusion, rubbing his arm as he looked at his sister.

"He was about to stick you with this" Bree stated, holding the syringe higher to examine its contents. "I don't exactly have your super smarts but I'm sure this is that virus we came here to stop."

Adam helped Chase stand up while the smaller boy stretched his arm. "Sorry about the arm," Bree added with a frown, "he was really close to it so I grabbed it to shove you backwards and I might have wrenched it the wrong way." Chase shook his head and smiled at his sister to show he was perfectly fine.

"I think I'd rather prefer the twisted shoulder than being injected with that." Bree nodded and turned to the scientist while Chase edged to her side, moving over slightly to make room for Adam who came to stand protectively in front of his two younger siblings. "Since the guy clearly doesn't want to come willingly," Chase started, glaring at the man now sitting on the ground in front of them, "Bree, check him for any more vials of that stuff, I'm going to check the rest of the bunker." Bree nodded and sped off as Chase took a quick scan of the syringe Bree had taken originally then used the results to scan the rest of the room for anything of the same composition. Coming up with no results and seeing Bree finish her search with a shake of her head, Chase walked up to the scientist and grabbed his arm to haul him up. Adam rushed forward to grab his other arm.

Just as the two reached the door with Bree trailing behind, the scientist disappeared with the rest of the bunker disappearing just as quickly. Sighing, Chase took off his simulator goggles and noticed his siblings doing the same.

"Woo hoo, we got the scientist!" Adam said excitedly, throwing his hand up for Mr. Davenport to give him a high-five. Mr. Davenport in turn shook his head, walking out from behind his holo-desk.

"I'll admit, you worked really well as a team but it should have never gotten that close to mission failure" the inventor chastised lightly. Chase sighed, hopping off of the virtual platform to stand closer to Mr. Davenport.

"That was my fault, Mr. Davenport, I thought his hands were empty" Chase admitted sadly. Adam nodded as he draped his arm around Chase's shoulder casually.

"Yeah, we were totally doing awesome up until that point" the taller boy pointed out, making Chase pout as his statement wasn't disputed.

"Mr. Davenport, we completed the mission anyway so what does it matter?" Bree objected. "It's useless saying we were close to mission failure because we didn't actually fail the mission."

"But it could have been mission failure!" Davenport countered. "If you hadn't have been there, Bree, Chase would have been injected and the mission would have been compromised." Chase frowned, crossing his arms.

"Who cares?" Adam asked, squeezing Chase's shoulder. "Yeah, we will always be there for each other," Chase added, a small smile on his face. "On missions" Bree added, no doubt shuddering at the thought of her brothers always being around her no matter what.

"And they'll have me as back up!" Leo said excitedly, putting his hands on his hips in his odd imitation of a superhero. Really, Chase didn't understand the pose; why would a superhero just stand there with his hands on his hips, gazing up into the clouds when he is supposed to be saving people?

Davenport sighed but conceded, finally congratulating the three bionic siblings on a job well done and telling Leo, again, that no, he couldn't 'play with the simulator'. Watching the scene, Marcus clenched his fist as he realized the error in his plans.

"I don't need to separate Leo from them," he began, his face lighting up as the five 'family members' hugged each other, "I need to separate one of them from the others."