AN: So here it is a new story. I hope you enjoy it.

DISCLAIMER: I don't own Criminal Minds or any characters.

It had been 2 months since the child ordeal in the BAU, and besides doctors' appointments here and there, everything was relatively normal. JJ still suffered mildly from her asthma, though it had gotten better over the 2 months. Emily was getting back to her milky coffee and chocolate dates, though sometimes seemed to throw up after too much. Derek was moody at the best of times, but the past month the real Derek had seemed to be creeping back and in the last 2 weeks no random outbursts of anger had happened which was a good sign.

JJ, Emily and Derek had just returned to the office after appointments at the doctors and a therapist appointment for Derek.

"Hey guys, how did your appointments go?" Reid asked the three as they took a seat at their desired desks in the bullpen with everyone else, including Hotch who wanted to see how their appointments went.

"Mine went great. My therapist said that I seem to be in a lot more control than earlier in our sessions and I don't need to go to anymore sessions as long as Hotch clears me for calmness in the next few cases." Derek explained; finally glad to have his therapist of his back. He was a nice man, but his too many questions sent Derek around the bend sometimes.

"I'll make sure to email Dr Phillips after our next case" Hotch told Morgan, accepting his nod of thanks.

"My doctor did a final test on me and after having macaroni and cheese with lots of chocolate last night and having no symptoms I am cleared to having as much dairy as I like. If I start showing symptoms again I'll have to go back obviously but for now I'm totally out the clear" Emily smiled, high fiving Derek as they were both out the clear and ready to move on from the whole ordeal all together.

"What about you JJ?" Penelope asked, frowning at JJ who was digging through her purse annoyed.

"My chest is still rattling so I don't have to take my inhaler as much but I have to carry my emergency one around at all times, especially in the field and if my chest worsens to go straight to A&E. So technically, my doctor is still on my back, all the damn time" She explained, though her head was still buried in her bag.

"So you kidnapped him and hid him in your bag?" Rossi asked, everyone laughing, though JJ just frowned up at him.

"No Rossi, you're hilarious. My emergency inhaler case is in my purse but my actual inhaler isn't. I can't find it anywhere and I can't even use my other ones in emergency because Dr Smart-Ass took them off me" Before anyone could speak, Strauss stormed into the bullpen, folders in her hand.

"Conference room. Now!" Strauss bellowed, making JJ jump, dropping her purse. She growled, tempted to trip the old woman up as she past her.

"JJ" Hotch scowled, though JJ smiled innocently up to him, laughing with Penelope who helped her pick up her purse and belongings.

"Thank you" She whispered to her best friend, walking into the conference room with her.

"We have an urgent case in Pennsylvania which needs our assistance. A family annihilator is going around killing families of four, the mother, father and children. So far 3 families have been killed, that makes 12 victims that we know of. In the first 2 families, the children were adopted and the local PD thought that was a trigger for the killer to kill those families but the recent family hadn't adopted, the kids were their own. All the families are of the same MO. A mother in her late twenties to early thirties, black hair, and brown eyes and a stay at home mom who spends her day either home-schooling the children or doing housework. A father who is in his mid-thirties, black hair and brown eyes, all who had a high end jobs, the first 2 lawyers then the last was a councillor. The fathers seem to neglect their children, from relatives we have learnt they are hardly ever at home, working all the time and such. The children, the same in all 3 families, boy with brown hair and hazel eyes, girl with blonde hair and blue eyes, both typical kids, girl aged 11 and boy aged 8. In the first family the kids were home-schooled but the other 2 the kids went to public school as normal"

"I don't understand why this is a high priority case that would go through you?" Emily queried, going through the file that Strauss had passed around.

"Well Agent Prentiss if you would stop interrupting I could get to that" Strauss said sternly, sending a pointed look to the brunette.

"Sorry" Emily muttered, shuffling stiffly in her chair, everyone silently making a pack to not say a word until spoken to directly. She was not to be messed with today.

"Now where was I? Ah yes, as I was saying, the unsub breaks into the family's home, and heads straight to the parents room, completely out of a family annihilators usual take on the situation. As we know, they usually go for the children first, using them as a bribe for the parents to cooperate. The unsub gags and ties up the father and shoots him in the head, on what we know making the wife watch. Then they knock out the wife and children and take them to another location. A week later they are all found in their backyard, the cause of death for the children are tortured to death, the deaths varying from electricity to drowning and the wife's cause of death is a slit throat but she has been tortured somewhat first. So far, we are unaware of how he gets them back into their yard without the police seeing but somehow, he does it. I want to send 4 of you undercover as a family to draw in and locate the unsub" She concluded, seeming quite happy with herself, though nobody knew what she was meaning by undercover as a family, considering their team definitely didn't consist of a 11 year old girl and 8 year old boy.

"Ma'am, how exactly can you send us undercover when the youngest member of our team is 25 years old?" Emily questioned, speaking everyone else's unanswered question.

"You all recall the last major case you all had, agents Jareau, Morgan and Prentiss being turned into children?"

"You don't have to remind me" JJ muttered, knowing she was still living the pain of that case with her chest, though she was glad when Strauss continued seemingly have not heard her.

"When we received this case last week, I gathered a team of scientist to modify the drug that turned you into children so that anyone who takes the drug will not get the illness you came down with and that with the right amount your age will differ, and obviously the cure has been modified to change you back with no difficulty. The only difference is that their memory may be slightly out of place and they may not remember that they are FBI agents. Some of the people tested remembered everything, others remember not a lot"

"Wait, so you expect us to take that stupid drug again and go through the hell we have already been through just to find an unsub who we could easily catch without the undercover stunt?" Emily exploded, knowing how awkward the recovery has been for them all ever since the ordeal, both physically and mentally.

"Prentiss I can assure you, the trauma sustained from the last ordeal with the drug will be nothing like this time, it has been tested and approved by a group of highly trained scientists"

"Tested on humans?" JJ asked, slightly lenient to the idea and slightly horrified that they would test such a drug on people.

"Yes, on themselves so no people were harmed or tested on in the process agent Jareau" JJ nodded, placing a hand on Emily's arm to calm her.

"Okay, so who are you planning on sending undercover?" Garcia asked, seeing everyone had sunken the idea into their heads.

"I want Prentiss and Hotchner as the parents, Hotchner working for a local law firm and Prentiss as a stay at home mom. Due to the similar physicality's, I want Reid and Jareau as the children. You all have two hours to discuss everything over before the doctor arrives and when you arrive at Pennsylvania tomorrow, the local PD will have all the information for your new life styles for to get used to. I wish you the best of luck and I will be keeping in tabs of the investigation" Without another word, she left the conference room, leaving everyone to ponder over what she just said.

"Does this mean I have to start calling Hotch dad?" Reid cringed making everyone laugh, though JJ's wasn't as heart felt as everyone else's. Nobody besides Hotch knew about her past and if she was going to be 11 again, the mental state of 11 year old JJ will be coming straight back and she wasn't sure if she was ready for that.

2 hours later, a doctor showed up, a metal briefcase in his hand. He popped his head into the conference room catching everyone's attention.

"I'm here for an Agent Jennifer Jareau and Dr Spencer Reid?" The two agents stood, gripping onto each other's hands as they were lead out of the room. Everyone sat for a few minutes in silence, watching as JJ and Reid were lead to the elevator, probably being taken to the 3rd floor where all the labs were.

"Any of you notice how scared JJ looks?" Penelope asked when the elevator doors shut and the red digital numbers started counting down, finally stopping on 3 which is where they suppose their two friends where now.

"I just think the whole kid thing is too soon for her right now. I mean it was only 2 months ago and she is still affected by it more than we are. She should be okay though, I mean she'll be with us the whole time and we know no side effects take place this time." Morgan said, hoping this won't affect the blonde more than she already is right now.

10 minutes later Emily and Hotch were called down to the 3rd floor and were lead to a lab at the back of the building. When the entered the room, an 11 year old blonde was standing over a young boy who was crying on the floor. Hearing the door close, the blonde turned to see Hotch and Emily and ushered them over.

"Reid can't remember much. It's weird how his memory has worked. He remembers working with the FBI but can't remember anything from his past which is scaring him. Also when he was young he had glasses so his sight is really bad right now"

"What about you? Anything so far?"

"My memory is fine; nothing big seems to be missing in my head. My chest is a bit more tighter but my asthma started to wear off when I was 13 or 14 so shouldn't be too bad" She explained, though she was slightly self-conscious at that moment in time considering the clothes they had for her were too small so she was currently walking around in her large work shirt. Reid had a pair of jeans on, a jumper and a pair of converse.

"We are giving you the cure in case anything urgent happens which you will need to change them back, but we are only giving you one vial because we still have to mass produce the cure and no problems should occur anyway. It's just for emergencies only." The doctor explained handing Hotch a vial with a blue liquid in. They nodded and watched as the doctor left the room, leaving them alone.

"You ready for this?" Hotch asked Emily, looking to the brunette next to him.

"Yeah, are you?" Emily asked back.

"I'm always ready for a challenge" Hotch smirked making Emily laugh.

"Right-"Emily clicked her knuckles and looked to the two kids, "-Let's do this"