A few months passed since the team was formed. They had a pretty good success rate in cases, although some of them ended in an unfortunate fatality of the perpetrator. The team had gotten in a habit of spending a lot of time together and had a bond. Suki and Sokka were inseparable and it was clear that Sokka adored her. Suki felt the same way and had ended up kissing Sokka one night after a mission that nearly costed him his life and they've been together ever since. Aang had attempted to flirt with Katara at every given moment, but she was so oblivious to it and paid no attention to it. When Suki had brought it up to Katara one night she felt bad. She then confronted Aang about his little crush and explained to him that she liked him as a friend, and she was sorry that she didn't feel the same way. Toph and Zuko had begun a very good relationship, they became like siblings to each other. Toph had never had a sibling, or even a friend really. Zuko and Katara became like the parental figures of the pair had always chastised every single other member if they did something that was remotely wrong. They mainly had to tell Sokka off or prevent Toph and Aang from causing some kind of mischief. There was a strong bond between all six of them, and they became a well liked team within the bureau, especially with Iroh as their mentor.

The team had gathered In their conference room in the morning and began to talk amongst each other let out a small cough as she got everyones attention in the room. She motioned to the screen. She motioned to the slide in the slideshow and looked around. " for a few weeks now there have been many trains across the Earth Kingdom that have been stolen. The trains have been recovered, but everyone on board was slaughtered and their belongings were stolen if they were of high value." She explained.

Suki looked at the screen, her gray eyes emotionless. It was hard to keep emotions at bay, especially when you did this job but she had no other choice. " There isn't any security footage?"

" well..there is. its not very good though. we have footage from each station, but all you can see is little clips. At one point on the train the footage goes completely blank, almost as if someone interfered with the feed before they began their heist. " Iroh interjected.

" How were all of the victims killed. Was it a one person job?"

" Seems to be a one man job. Look at this. " Zuko thrusted the file towards Aang to show him the more detailed crime scene pictures.

Aang winced inwardly at the gorey scene.

" Coroner confirmed it was done with the same knife. Sneak attack, ninja style." Sokka said, Turning towards the rest of the group as he had read the coroner's report out loud.

"Get ready. we're gonna go undercover." Zuko informed, kicking his chair back and getting up. He raised his eyebrow and glanced at the group. " Hope you're all comfortable with a change in scenery. we're going to be taking a trip to the train station." He teased as the team followed Zuko, sans iroh.

Katara slid her sunglasses down over her face as soon as she stepped into the train station. If Sokka and Iroh's calculations were correct the next train heist would be on the train heading southbound from Omashu. This train stealer was making a pattern for herself and Omahu seemed like the next likely area to hit. The dark haired woman tossed her hair behind her shoulder before grabbing her ticket from the booth. She gave the ticket seller a small smile and headed towards the train, tilting her head to examine the scene before her. The station was full, which made matters worse. They didn't know anything about the perpetrator this time. She was undercover as a University student that was heading home for her grandmother's birthday. She found her seat and sat down, making sure she could get a good look on the scene in front of her, directly facing towards the Train car doors. The train began to take off and Katara decided on ordering a cup of coffee. Iroh nearly passed out as soon as he heard her call the order to the Service Attendant.

She rolled her eyes mentally at the overdramatic gasp from Iroh's end. She rubbed her face with her sleeve and mumbled " Footage still up?"

" Affirmative." Iroh confirmed for her before continuing. " there's a woman heading your direction. She keeps looking around. " he continued.

Katara swallowed and smiled up at the service attendant as she was handed her mug.

" Copy."

Katara placed her finger on her earpiece as she murmured into it " I got eyes on a possible suspect." She took a sip of her coffee, pretending to focus on reading a novel. Katara put on the sweetest smile as she looked at the young woman with shaggy brown hair.

" Is this seat taken?" Smellerbee asks, motioning to the seat across from her.

Katara shakes her head. " No, its free. Go ahead" she nodded, rubbing her fingers across her necklace. She had purposely worn he mothers necklace because she knew it would catch the eye of the perpetrator.

" That's pretty." Smellerbee said softly.

" Thank you. It belonged to my mother before she died." Katara said gently. She was almost certain that it had to be her that was the suspect now.

" Cameras in your car are all out now. As soon as that woman got into the car she shorted the footage out somehow. I'm blind in here." Iroh warned Katara.

Katara couldn't respond back without making it seem suspicious so all she did was turn her attention back to Smellerbee, deciding to make small talk.

"So, where are you going to?"

" Im heading to the edges of the Earth Kingdom." Smellerbee revealed, being very vague with her answers.

Katara smiled, placing her hands on top of Smellerbee's gently, gasping " Me too!"

Smellerbee smiled, slightly uncomfortable at the touching.

While Katara was telling Smellerbee a fake narrative, a few cars down, Aang and Suki were placed by the baggage area, quickly throwing on Service Attendant clothes to keep their cover.

" You head towards the front, and i'll take the back" Aang suggested.

Suki nodded and quickly fixed the hat over her head as she headed out the door, flashing a glance at the cameras that she knew were still in service. She had gotten a sight of Katara who had nonchalantly signaled to her that she could handle it. Suki continued her act, but got stopped when an elderly man had began to ask her a question. Aang didn't have much luck in his position either. He was surprisingly really good at Pretending to be a worker. He was unfortunately, too good and too kind to refuse to help people.

Toph and Zuko had decided on stowing away instead. Toph was very loudly bumping into every single seat. She was slightly disoriented from how fast the train was moving. It had thrown Toph's senses out of let out a loud laugh as Toph bumped into a wall.

" that's a wall, Toph"

" WELL YOU SHOULD HAVE FREAKING TOLD ME" she screamed indignantly

" I just did."

Toph growled under her breath and stomped off, heading to her respective position, cursing and mumbling angrily the entire time.

Katara immediately took off sprinting as soon as Smellerbee had gotten up and Bega to power walk towards the conductor's car.

She was suspicious from the get go and it was clear she was the suspect they were looking for. Smellerbee leapt agilely across the beams that separated the cars from each other. " stop!" Katara shouted, leaping over them as well. " BSSB, drop your knife." Katara yelled.

Smellerbee smirked a bit and grabbed the conductor, quickly slitting his throat.

The man fell to the ground, dead before he made impact. " no. " she said firmly

Katara raised her gun , pulling the trigger almost immediately.

The bullet whizzed right past Smellerbee and out the window. The tiny woman was almost too quick. Katara would be wasting her bullets if she continued. She couldn't catch her this way. She hissed in frustration and flipped the safety back on, pocketing the gun and getting a little closer, raising her hands in the air. " hey, I'm not gonna do anything. " she said calmly.

" don't get any closer! I'll stab you like I stabbed him" Smellerbee shrieked, beginning to take control of the train. Katara saw an opportunity and took it. She leapt over and tackled the woman against the control panels, beginning to punch and kick. With each hit she made, Smellerbee made almost an equally balanced block or attack. They were nearly equals in their hand to hand.

Smellerbee slashed the knife downwards at Katara, grazing her arm. Katara hissed in pain and slammed her opposite hand into Smellerbee's chest, grabbing her wrist and twisting it so that the knife dropped with a loud clank as it hit the floor next to the corpse.

Zuko slammed the door open, his eyes widened in shock as he noticed Smellerbee and Katara in perfectly matched combat. He began to rush forward but was stopped by a loud scream of annoyance.

Katara had Smellerbee cornered in the control room and were currently wrestling over control of the train. " Zuko, get out of here, make sure you can separate this car from the others" she gasped out as Smellerbee sent a strong kick in her gut. Zuko trusted her enough to know she could handle herself, but he was hesitant to do so.

" No, I'm not gonna leave you here alone. I refuse, you've saved my ass before and now I'm here to save yours!"

" You have to, you need to help protect the passengers. I give you my word that I will take control of the train back. You need to get the hell out of here. Find Sokka. He will know what to do" Katara grunted out between each hit.

Zuko finally nodded in agreement and began to send the orders through his earpiece so the others would know what to do as he had leapt over the barrier that separated the control room from the first class. Katara got out of Smellerbee's grip long enough to be able to slam her fist on the controls, separating the cars from the conductor's car.

Zuko gave her a sad look before racing back to find Toph and Aang who were about to jump out of the train car.

" Sokka and I will make sure the passengers are safe" Suki promised Zuko as she shoved Sokka towards the passengers that had gathered in the caboose.

Zuko gave another nod and looked at Aang and Toph. " on the count of three, we need to jump." He informed, locking his hands with Toph's gently to guide her.

" one." He called, swallowing roughly as he noticed the conductor car begin to pick up speed again.

" two." Aang said confidently, gripping onto Toph's other hand.

" Three" Toph shouted impatiently as she tugged both men with her. The three of them stumbled and crashed violently to the ground in a pile of limbs.

Aang sat up and spat dirt out of his mouth" yuck!" He grunted. " is everyone okay?"

" I'm good, Twinkletoes. Got all of my limbs. How about you, Sparky?"

" yeah, I'm good." Zuko panted a bit, rolling over and groaning as he stumbled back to his feet, tugging Aang and Toph along as Iroh had sped up in a car.

The three had barreled into the car and took off, sirens blaring as they maxed their accelerator out.

Smellerbee hissed in pain as she slid another dagger out of her pocket, slashing it against Katara's skin.

Katara wouldn't give Smellerbee the satisfaction of screaming, instead she looked at her in the eyes and head butted her as hard as she could, getting a grip of her shoulders and slamming her into wall. " stop!" Katara gasped again.

" I can't." Smellerbee shouted, slashing at Katara again. This forced the taller woman to back up. She grunted and began to wrack her mind for an idea. What would Sokka do?

Smellerbee went for another attack, but this time Katara was too quick. She spun around and gripped the handle that controlled the breaks.

Smellerbee slammed into Katara again until she was in the floor in the pool of blood blood from the conductor. " say your last words, Agent." She hissed, spitting in Katara's face

" that's gonna leave a mark." Katara sassed before she jammed the knife that was on the floor into Smellerbee's gut, sending the woman flying off once again. Katara then kicked the handle that controlled the speed of the train so hard it jammed and began to pick up speed.

Katara glanced at Smellerbee who was gripping onto her stomach in disbelief and jumped out of the train car just in time.

Suki and Sokka had gotten the passengers of the train to the very last car.

" Listen up everyone. BSSB." Sokka flashed his badge to the crowd to calm them down a bit.

" Everyone is going to be okay. You just need to trust us." Suki said calmly.

Sokka was hatching a plan to stop the car. There was too many cars that separated him and his sister and he was worried for her. He bit his lip and glanced around before furiously tearing at some of the larger pieces of equipment.

" Sokka!" Suki gasped out in shock, confused by his actions.

Sokka couldn't reply. He was too busy trying to make a makeshift brake out of machinery and various passenger baggage. He frowned and began to tie a few loose ends together.

"Listen, I'm trying to slow the train down a bit. If it crashes we may still get injured but I need to reduce those odds more. You grab this end" He trusted it towards Suki who took it and headed towards the door of the train car.

Sokka had shoved the other end up into the luggage racks, then tied a few of the makeshift shirts tightly around it.

" On my signal, throw it like its a spear, if you're accurate enough-" he got cut off by Suki's death glare.

" I mean, once you throw it and it lands in the ground it should have enough weight to it to begin to drag and catch on something, slowing the train down enough to let the passengers off safely."

Suki nodded, glancing back at Sokka as he was watching, waiting until..

Sokka finally Yelled " THROW IT NOW, SUKI"

Suki obliged and launched the invention as hard as she could. She watched as it sailed through the air and finally launched itself in the ground with an ear piercing screech that made many passengers cringe and cover their ears.

Once the train had slowed enough that it was moving idly along, Sokka began to nudge passengers to the front. " you're all going to have to get off as soon as it stops."

he instructed, showing them a direct path to safety.

Iroh, Toph, Aang and Zuko had came barreling down the mountain in a car. Toph and Aang had exited the car and raced towards the train, beginning to assist Suki and Sokka with the passengers while Zuko got onto the train again.

As soon as everyone was off and Zuko had cleared every remaining car, his head jerked up as he heard an explosion so loud he swore the mountain shook. The Team raced off towards the noise once again, frightened for Katara's life.

" Where is Katara?" Zuko shouted angrily, looking around the wreckage. The train cars had been stopped, but the control room car had crashed into the side of the mountain. He was worried out of his mind.

"KATARA?"

"SWEETNESS?" Toph began to yell from beside Aang, beginning to rummage through piles of debris. It was so hard to even breathe from the amount of smoke from the flames.

Sokka, Aang and Suki had sped up in a patrol car. Sokka slammed his foot on the breaks and nearly jumped out of the window. "Where the hell is my sister! Why did you let her go alone, you jerk?" He screamed, grabbing Zuko by his shirt.

" I trusted her, Im so so sorry, Sokka. I shouldn't have let her go alone. It's my fault. i don't know where she is." Zuko choked out shakily. If Katara was dead, it would destroy him. He had developed a fondness for her and wouldn't admit it outloud but he found her to be stunning and fierce.

" Hey, what the hell are you guys screaming at each other for?" Katara croaked from one of the ditches. She was covered in blood and crawling towards the group with a determined smile plastered on her face despite the excruciating pain she was in.

"Katara." Zuko breathed, sprinting over and sliding on his knees as soon as he reached her side. He pulled her into his arms and hugged her tightly, stroking her hair." You're okay? We thought you died.. the train car exploded and there's so much.." He choked out, unsure of how to continue explaining the scene in front of them.

Katara let out a soft squeak of pain as soon as Zuko hugged her, but smiled." Seems to me like you really care about me." She teased.

He chuckled and sighed. " don't ever scare me like that again." He sighed into her hair, letting her go as he examined her once more. " are you okay? You're covered in blood." Zuko finally said after his frantic checking.

Katara nodded a bit. " when I jumped out I made sure to tuck myself and roll" she said tiredly. " I landed in that ditch and I guess I cut myself over the rocks and thorns. I think I'm okay. I don't think anything is broken. Most of this blood isn't mine, I don't think at least."

" we've called EMS, they're on their way" Toph said, catching her breath since she had sprinted towards them. " you okay, sweetness?"

Katara didn't have time to reply because she heard Sokka screaming her name at the top of his lungs.

Sokka tackled Katara into a hug, nearly sobbing at the sight of his baby scared the shit out of me, Katara! I thought I lost you! I couldn't handle that if I lost you-" he choked, kissing the side of her head affectionately.

Suki and Aang had finally caught up by the time Sokka had let go of his sister.

" is she okay?" Aang said nervously.

Katara smiled at Aang and nodded, pulling him and Suki into a hug. " I'm fine" she reassured them.

" regardless, you're getting checked out. We can't risk you having internal bleeding and dying on us" Zuko said firmly.

As soon as the ambulance came and checked Katara out they sent her to the hospital to get stitches and to make sure she didn't have a concussion since she had head butted Smellerbee so hard.

Zuko sat in the chair beside the bed as he listened to Katara's soft hisses of pain as she was getting stitched up.

" look at you, you're all badass now." Zuko said in a playful rasp

" shut up. At least I don't have a concussion."

" yeah, cause if you did I would have to bench you until you were cleared."

" bench me? If this is a game then it's the shittiest game ever played" she laughed

Zuko laughed as well and looked at her. " go home and get some rest. Take it easy. " he instructed

Katara nodded, glancing back at the door as Sokka had came in. " hey, you about ready to go?" He asked

Karate nodded once more. She felt like shit and felt like she needed to sleep for a whole month.

Zuko gently helped Katara to her feet and then smiled

" I'll see you guys later. Have a good night" he waved goodbye and left the hospital

Sokka wiggled his eyebrows playfully as he took Katara's uninjured arm in his " what do you want for dinner?"

" sleep." Katara replied

" that's fair." Sokka agreed and helped her to their car and then helped her into bed as soon as they had gotten home. He was glad his little sister was okay. She was his best friend and he was hers.