"Good attempt," Alex held her hand out to the young agent that she had just thrown onto the padded flooring. "But you need to work on your foot work." She patted the agent on the back as Vasquez burst into the training area.

"Danvers, we need you in the command centre," she blurted out, eyes briefly roaming over the rest of the agents.

Alex didn't ask, she just followed Vasquez out of the room and then overtook her as they jogged to the command centre. Winn had an earpiece in his hand and handed it to her solemnly.

"It's Supergirl," he told Alex as she shoved the comm into her ear.

"Supergirl?"

"Alex?" Kara's voice filled her ear. She sounded distant and scared.

"Supergirl, what's wrong?"

"Alex?" Kara's voice was strained.

"Supergirl, are you hurt?" Alex ran to the nearest computer and pulled up a map with Kara's tracking information flashing across it.

"Alex?" Kara was breathing heavily; the sound muffled her voice, as did the wind being picked up by the comm.

"Can she hear me?" Alex called to Winn who nodded uncertainly in response.

"Kara, talk to me," Alex demanded as she turned back to the map on the computer screen.

"She won't wake up."

"Who won't wake up?" Alex tried to hide the fear in her voice. "Kara, what's going on?"

"It's Maggie. She won't open her eyes."

There wasn't time to ask what had happened, for a second Alex couldn't even speak.

"Has she got a pulse?" Alex finally managed to get out and the words seemed to hang in the air.

Alex looked around the command centre desperately looking for some reassurance but Winn and Vasquez both looked worried as only the sound of the wind came through their earpieces.

"Yeah," Kara's voice finally reappeared in her ear and Alex let out a shaky breath. "I can hear her heartbeat."

"Bring her to the DEO, I'll prepare the medical team." Alex began to head to the medical bay.

"I don't know where we are."

Alex stopped and turned back to the computer and watched the tracking signal move across the map, brows furrowed.

"Kara, you need to head north." Alex frowned as she took in the information on the screen.

"I don't know…" Kara sounded disorientated.

"Turn right," Alex commanded and watched the tracking dot change course on the screen. "A little bit more," she told her. "That's it, keep heading in a straight line, you're about forty miles away."

"Alex…" Kara was cut off by an earful of static. Alex grimaced but kept the earpiece in her ear.

"Try to get her back," she called to Winn as she stalked towards the medical bay.

She stood at the door and shouted her orders of what to prepare before she jogged back to the command centre where J'onn was now being briefed by Winn.

"Alex, what is going on?" J'onn moved towards Alex who was stooped back over the computer with Supergirl's tracking information.

"Maggie is hurt, Kara is bringing her in now." Alex didn't look up from the screen.

"What happened? Why were they so far out of the city?" J'onn leaned over the computer.

"I don't know, we lost the comm line to Supergirl and we've not got it back yet." Alex began to pace the command centre.

"Guys, I've got something," Winn called to them, "The NCPD were involved in a standoff with an alien downtown," he informed them as they headed towards his desk. "They are reporting that he made Detective Sawyer and Supergirl vanish into thin air and then tried to flee the scene."

"Did they get him?"

"Yeah, they have him in custody," Winn told them as he pulled up a video on the screen. "It's already on the internet."

Every agent that was now assembled in the command centre watched the cell phone footage of the NCPD standoff. Alex flinched as she saw the alien grab Maggie and a split second later Supergirl reached her, the cameraperson stumbled slightly and by the time they had refocused on the action, both Maggie and Supergirl were disappearing in a bright flash of purple light.

"Winn, get me the NCPD on the phone, I want that alien in our custody ASAP," J'onn barked at Winn as the video ended.

"I've never seen an alien do that. Are we sure that wasn't a metahuman?" Vasquez offered.

"That light does look similar to the interdimensional portals created by that device that The Flash gave Kara," J'onn mused.

"That's what I thought. I'm already running a search for similar incidents," Winn told him as he went back to tapping on his keyboard.

"When did this happen?" Alex's voice was hoarse.

"Just under an hour ago."

"Then where have they been since then?"

Alex began pacing the command centre, eyes flitting to the computer with the tracking map. Supergirl was still on the right course.

"What's taking so long?" she mumbled to herself in frustration. She knew Kara couldn't fly too fast with a human in her arms, she wouldn't want to injure Maggie further, but she still seemed to be taking a long time.

Alex was walking her second lap of the command centre to try to ease her anxiety when Winn called out to them again.

"They're twenty seconds away."

Alex breathed a sigh of relief and made her way to the balcony, taking the steps two at a time, but she didn't quite make it to the entrance.

"Alex!"

The next thing Alex knew she was being tackled to the ground at the top of the stairs. Whoever it was that had thrown her to the ground had protected her head, but the rest of her body screamed from the insult as the world grew dark, muddled and silent for a second.

And then chaos erupted.

Glass shattered around her. The body above her moved in closer to shield her face from the sharp shards. Once the glass had all hit the floor, the body above her rolled off, allowing Alex to sit up in time to see a blur of blue and red collide with the big circular table that had been the focal point of the command centre.

The sound was deafening and the whole building seemed to shake from the impact. Agents were shouting, their weapons drawn on instinct. Next to her, J'onn picked himself up off the ground to take the lead.

"Stand down," his orders were clear even through the chaos.

Alex followed his lead and struggled to her feet, still a little dazed.

A crowd had formed around the remains of the table. Alex stumbled down the stairs and across the command centre, pushing herself frantically through the crowd. Dust from the rubble stung her eyes as she took in the mess around her.

Supergirl had missed the open balcony entrance and smashed through the glass above, leaving a gaping hole in the window. Her descent into the command centre had been high, and the plaster was falling from where she had grazed the ceiling and then a support pillar before obliterating the table. Supergirl had come to rest on her back, her eyes closed. On top of her, covered by the red cape, was Maggie, her head was resting on Supergirl's shoulder and her eyes were also closed.

Alex was torn over who to help first as she slowly approached the pair but Kara took the decision away from her as she fought to get herself upright with Maggie still clutched in her arms.

"Supergirl?"

Alex watched helplessly as Kara appeared to sway on her shaky legs. She pitched forward dangerously and J'onn jumped forward to help her stay on her feet, only for Kara to try to hit him with her heat vision. J'onn got out of her way and the weak stream of heat hit the already cracked floor, instantly dispersing the crowd of agents. Kara took the opportunity to escape as the rest of the agents got themselves to safety.

J'onn recovered quickly and only he and Alex followed the superhero, reluctantly keeping their distance to maintain their own safety. Kara slowly made her way up the stairs, each step looked like an effort and Maggie slipped lower in her grip as she got further up the staircase.

Somehow Kara made it to the medical bay without falling and without dropping Maggie. Only once she had placed Maggie down on the bed did Alex dare to approach.

"Please help her," Kara called desperately as she sank to her knees, shaking violently.

Alex led the medical team as they swarmed around Maggie, attaching monitoring equipment and oxygen and then inserting needles as they tried to wake her up and determine what was wrong with her.

J'onn put his arm around Kara and tried to help her to her feet but Kara stayed down, shrugging J'onn away as a couple of tears escaped her eyes and she fought to catch her breath.

"Okay, let's get those bloods run, stat." Alex ordered. "She's stable for now but I need that tox screen ASAP."

Kara collapsed backwards into J'onn's arms, as if all she'd been holding on for was confirmation that Maggie was okay. Her eyes fell shut and she became limp in J'onn's grip.

"Supergirl?" J'onn shouted, shaking Kara urgently.

"What happened?" Alex crouched down next to the pair and placed two fingers on Kara's neck.

"Her eyes rolled back, she just passed out," J'onn told her as he continued to try to wake Kara.

"Get her on the bed," Alex told J'onn as she stood back up.

J'onn effortlessly placed Kara on the bed next to Maggie's and gently brushed the hair from her face before he was pushed out of the way by the medical team.

"We need access to that alien, ASAP. We need to know what he's done to them."