(This is the sixth in the X series, and is intended to be read after "Xhalation", "Xcogitate", "Xemplify", "Xpectation" and "Xotica".)
"So what is it?" Doctor Harrington stared through the thick plexiglass viewing panel, still unable to believe the evidence of her eyes as she stared at the... the creature on the other side of the clear plastic window. It looked human--well, humanish--but its skin had broken out in patches of unusual pigmentation that varied from a light, minty green to the deep, rich color of a pine forest. It looked almost translucent in places, as though the discoloration of the epidermis wasn't so much a rash as it was a gradual attenuation of color to reveal the viridian flesh underneath. Its head was flung back, and thick green mist billowed up from its mouth up to the ceiling where a powerful fan carried it away.
"It was a forensic chemist," Agent Rodriguez said, looking at the creature with a sad expression on his lean, rangy features. "We're not sure what happened, some sort of slip-up in lab protocols, maybe... but this is all that's left of them. We've tried communicating with them, but they don't talk. They don't seem to acknowledge our presence anymore. They don't even move as far as we can tell. They just keep blowing out that green crap. We're pretty sure it's uncut X, but it's hard to be sure. You can't analyze the shit, and nobody here wants to try breathing it in. Not when we saw what it did to the other one."
He gestured with long, expressive fingers to the cell next to the chemist. Doctor Harrington squinted, but the room was so full of viridian fog that she couldn't make out any details. Then something shifted, and she realized that there was another of the creatures pressed right up against the glass. It was fully translucent, and its coloration matched the thick mist that filled the small room; only when it moved could she identify it against the camouflage that it had apparently breathed out. Doctor Harrington couldn't help taking a rapid step backward, even though she knew that the plexiglass could withstand assault rifle fire without any significant damage.
She forced herself, consciously, to breathe. "Do you know who they... were?" she asked, once she'd recovered her composure enough to keep her voice from trembling. It wasn't easy; most of her work at this point had been purely theoretical, taking place in a comfortable office with nothing more dangerous to worry about than a paper cut from one of the NASA briefs she studied. She'd never been confronted with an actual specimen, let alone a green gelatinous creature that scratched constantly at the clear plastic walls of its prison in an attempt to break free and infect others with its contamination. Not for the first time in the last twenty-four hours, Joanna Harrington wished her name didn't appear on the top of a very short list of people to call in the event of a highly unlikely emergency.
Agent Rodriguez pursed his thin brown lips and furrowed his brow in uncertainty. "Difficult to be sure," he said. "DNA samples are hopeless at this point--they crash the sequencers, same as the drug crashes lab equipment--and we can't really tell much by looking at them anymore. Our best guess is that the thing on the right used to be Va Thao, from Seattle PD Forensics, and the thing on the left used to be Bryce Penders, a chemist at the university. But it could be the other way around, really. Who knows." His face contorted in horrified disgust. Joanna couldn't blame him.
She tried to cut away the shock and horror, to view this purely as a scientific exercise no different from the hypothetical conversations Joanna engaged in with her colleagues. They came up with them all the time, working out a series of deductions from an initial postulate one of them came up with over drinks. 'What if the aliens used arsenic instead of iron to metabolize oxygen?' 'Was it possible for a lifeform to feed on radiation?' 'Could different life forms perceive time or space differently?' "D-do we know which of them was exposed longer?" she asked, the quiver in her voice betraying her failure. This wasn't a thought experiment. This was two people turned into something outside any human experience, even hers.
Agent Rodriguez shook his head slowly. "They looked pretty similar when we brought them in," he muttered, his eyes a little bit distant. Joanna could guess what he was thinking about--she'd seen the bodycam footage from the officers who were called to the university to respond to the reports of the 'green monsters' who barricaded themselves into the lab and began to fill it with X. It had taken seven men in full hazmat gear to get them into custody, three of which wound up in the hospital from exposure to the gas. The things scrabbled desperately to escape the entire time, constantly trying to make for a nearby sewer grate. It had been awful just to watch, and Agent Rodriguez had been there.
He pulled himself back from wherever his memories had taken him and continued. "The ventilator fans broke in one of the cells a couple of days ago, and the X built up to toxic levels within a few minutes. We didn't dare go in to fix it--once the gas filled the room, the thing started getting active, looking for a way to get out. We think they do the breathing stuff to try to make their local environment more hospitable and accelerate their transformation. The one on the left is still trying to fill up the room enough to change, but the one on the right turned into... that... in custody."