AN: This is the sequel to 'Discovery', however it's kind of a crossover with Stargate SG-1. You don't need to know much about that show, as long as you know that the Goa'uld are parasites that take over their hosts. This story does get a lot darker, so if at any point the rating needs upgrading, just let me know.

Disclaimer: read as standard, not mine etc, etc. No profit made.

Infiltration

"Incoming ship, crash course with the edge of the city."

Jack's head snapped up. Not good. The last time they'd had a ship on a crash course with the city it had resulted in an attempted assassination. He pushed the thought away as he morphed and slid into his delta runner, remembering Drew wouldn't help whoever was crashing now.

As before, there was no time to bring the ship down safely so they had to settle for limiting the damage. Unlike before, this ship wasn't SPD, it was triangular in shape and looked to be a golden brown colour in the dim light of the evening. This ship hadn't smashed into debris, so it was made of stronger stuff than SPD tech was. There was no sign of movement and he carefully gave the order to leave the megazord to conduct a more thorough evaluation.

Their attempts to get through the door were fruitless, even blasting the lock with either a Deltamax Striker or his Delta Enforcers was ineffective, not to mention the risk of doing more damage. He sighed in frustration and powered down. "You guys keep at it, I'm going in." Ignoring the immediate protests he walked through the wall he'd been leaning against, his blaster loose in his hand, just in case. He wasn't a complete idiot after all.

Walking warily through the corridors he was a little surprised that he hadn't seen anyone yet, not even any bodies. A ship this size should have a fairly decent sized crew, so where were they? The Egyptian style design was also interesting. Why would an alien ship have a design that so clearly belonged to an ancient Earth culture? It was a puzzle he didn't have time to concentrate on as he finally reached the bridge. Finding the door apparently fused shut, he simply shrugged and walked through it anyway.

The bridge looked like a bomb had hit it: bits of the ceiling lying on the floor, wires hanging exposed from still sparking consoles, the lights flickering dimly. Finally though, he'd found someone, most likely the captain, collapsed over one of the consoles. He pulled out his communicator. "Guys, I've found someone. They'll probably need medical attention so get a med. team on standby."

"Understood," came Sky's voice. "We're through the door, so we should be with you in a couple of minutes."

"Okay, see you in a bit." Flipping his communicator closed, Jack slid it back in its holder and made his way round to the console, getting his first look at the captain. Humanoid, with olive coloured skin and dark hair, it only took a moment to see that the man was beyond help, burns liberally covered his hands and face and there was a sharp piece of metal piercing his stomach. Reaching out in what was probably a futile attempt to find a pulse, Jack started back in shock when the man jerked slightly at his touch.

Dark eyes stared at him and the man's mouth moved silently, as if he were trying to say something. "What?" Jack asked quickly. "What is it?"

There was no response. Jack had one brief moment as the man's eyes glowed yellow, not unlike Z's when she replicated, before his mouth dropped open in shock as something slid out of the other man's mouth. His shock and hesitation was his undoing, as the grey, slimy thing launched itself at him, sliding into his mouth and biting through the back of his throat. He threw his head back in pain, silently screaming as he choked, feeling the unwelcome presence of something else in his mind, something dark. There was one horrifying instant with both of them struggling for control, the other mind surging against his, but, caught up as he was with trying to focus on breathing, Jack couldn't give it everything, and the last thing he remembered before everything went black was the smug sensation of triumph.

Ma'at blinked as he adjusted to the new body, the sensation of having metal piercing his stomach thankfully gone. Looking at the body of his former host, he disdainfully pushed it back into the seat and turned away looking for things he could salvage. He didn't have long to search before the door to the bridge opened and four other people walked in, weapons in hand. He stiffened, ready to fight before it sank in that his new host knew these people, was friends with them. He'd have to be careful, make sure he didn't do or say anything that would make them suspicious, the last thing he needed was to be found out.
Jack felt like howling with frustration. No matter what he did, he couldn't get control of his body back from the thing that had taken over it and he couldn't believe the others were falling for it. He thought for a minute that Z had worked it out when the thing controlling him made a callous comment about not needing the med team anymore because the other guy was already dead, but the moment passed as it covered itself quickly against the disbelieving looks from the rest of the squad, putting it down to shock or something. Come on! he bellowed inside his mind. Come on! That's not me, can't you see that?

As they started to move out, leaving the ship and its contents for the forensic team, he caught Sky looking at him steadily, expression closed, and he winced. Sky hadn't been that distant with him for a while. He felt his eyebrow rise in response to that look, and damn if that wasn't what he'd do anyway.

"Problem, Sky?" his voice asked and he cursed extensively at how quickly the thing inside his head was assimilating his memories, putting names to faces and attributing behaviour. It was going to be harder than he thought for the others to realise it wasn't him in control anymore. But Sky had a better chance, surely with his enhanced senses and all the rest of it, he'd know something was wrong…

Sky's expression never altered. "No."

Oh, come on! he yelled again. Come on, Sky, work it out! Sky studied him for an extra moment, then turned to follow the others out of the ship. Jack noted though that, despite his saying there was no problem, Sky managed to be between 'Jack' and the rest of the team for the rest of the evening.

Ma'at stalked into the pathetic box that passed as his living space, and threw the first thing that came to hand across the room. No matter what he did, the young man in blue was always in his way, and it was getting frustrating. No, it was beyond frustrating. If he didn't know better he'd think that the human knew he wasn't the person he was pretending to be, but that was impossible. None of the others seemed to think anything was wrong, so maybe it was just characteristic of this 'Sky'.

Throwing himself down on his bed, he began sorting through his host's memories of the man, trying to find anything that would help. He needed to solve this problem, and fast. Early memories of the relationship between the two proved that they hadn't always gotten along and at first he thought that maybe the two had never moved beyond that, but then he realised that analysis was too simple, and didn't account for the confused feelings his host had for Sky. No, there had to be something more. He frowned as his host fought back, trying to keep him out, but still he felt a surge of triumph. There had to be something there, something his host didn't want him to find out, something about Sky…

Oh.

Now that was interesting.