A/N. Thank you for all your reviews for the last chapter, I'm glad it went down well. I have also noticed that I'm nearly at 100 reviews now and that makes me very happy, so thank you again. I hope you enjoy the next chapter, it went through many rewrites before I was even vaguely happy with it. :) My inspiration for this again comes from watching a little too much Supernatural. I think at some point i may write a crossover. :)

Chapter 21.

Gwen was sat on a picnic blanket in the park, watching Rhys pushing Mary on the baby swings. It was so rare that she had a morning off like this that she was making the most of it. Gwen had been keeping an eye out for any Rift activity the night before so that Jack, Ianto, Jamie and Molly could go out on their various dates. Jack had in turn given Gwen the morning off to spend some quality time with her family. It was hard for Gwen sometimes, Mary was growing up so fast, and she worried that she would miss some of the milestones in her life. Sat here now though, they were just like a normal family, no aliens in sight. After a while Mary started to get bored of the swing so Rhys took her out and bought her back over to where Gwen was sitting. Mary climbed on to Gwen's lap and started to drink from her juice cup that had been nearby. Rhys sat down next to her and kissed Gwen on the cheek.

'It would be nice to have more days like this,' he said.

'Yeah,' said Gwen, 'We should make a point of doing things as a family when we can.' She then glanced down at her watch, 'I have to get going.'

'Really, can't you stay a little longer.'

'No, I only had the morning off, but I will try and get out early.' Gwen said as she stood up with Mary. She gave her little girl a hug and a kiss and then handed her down to Rhys. 'See you later sweetheart.'

When Gwen got to the Hub she found that the others were gathered in the boardroom. She made her way up there and took her place. 'Afternoon everyone,' she said smiling.

'Glad you could join us,' said Jack.

'Hey, you're the one that gave me the morning off,' Gwen said, then realised that he was laughing. Jack had been winding her up and she had fallen for it. 'What's going on?'

'We're not completely sure yet,' said Jack.

'Has something come through the Rift?' asked Gwen, confused by Jacks last answer.

'Yes, but we are not entirely sure when.'

'Ok, I'm confused. Is there some kind of threat?'

'Let me explain.' said Jack, 'There have been instances in the last few days of people carrying out violent attacks on people they know. None of these people have ever done anything like this before, they just started acting completely out of character. It starts off as paranoia, then builds up.'

'Maybe these people are on drugs or something,' said Gwen. 'I'm not understanding how this is our problem? Sounds like something the police should be dealing with.'

'I would have agreed with you, until Jamie here, was sent the results of a blood sample that was found at the scene of a fight. There is something in it that is not found on any database.'

Jamie took up then where Jack left off. 'It's the strangest thing to look at, there's something clinging on to the red blood cells, I can't determine what it is yet as I would need a better sample, but it definitely didn't originate here.'

'So these people are infected with something alien?' asked Molly.

'Seems that way,' said Jamie.

'What happens to these people?'

'No one knows. After each of the violent outbursts these people have shown, they've disappeared. No one has seen them since.'

'Disappeared?' asked Gwen, 'What sort of disappeared.'

'All the people who were showing signs of the paranoia kept saying they had to leave wherever it was they were at the time. If they thought people were trying to stop them, they got angry, upset and eventually violent. They then leave, and no one has seen them again.'

'Do you have any idea what this could be?' asked Gwen.

'That's the tricky part. Whatever it is could have come through the Rift in lots of different ways. It could have come through with something or on something. The problem with viruses like this, is that they are usually harmless to what ever carries them. Humans though react differently when exposed to it. Also it might be an accident that these people have been exposed to it, or something has a reason for doing it.' said Jack.

'You mean something could be deliberately infecting people, why?' said Jamie.

'Many reasons, to cause chaos, feed off the paranoia, kill. We need to find the source of the virus so that we can stop it.'

'How do we find it though?' asked Ianto.

'There must be a link between these people somehow. It can't be airborne or else the whole of Cardiff would be going crazy.' said Jack. 'If we get a decent enough sample of the virus, it might give off some Rift energy. Then maybe Molly can get a trace on it.'

The team sat around trying to take in all the information that was being given and the task was beginning to feel enormous. They were also wondering how something like this could have got through unnoticed, but nobody wanted to say that out loud.

'So what do we do now?'

'Unfortunately, it's a case of waiting. We need to keep an eye on police reports of any disturbances that could be connected to this, until then we carry on with our work.'

They didn't have to wait too long before Molly saw a call coming into 999 about a domestic disturbance nearby. A neighbour was calling to say that the person next door was breaking the windows in their house and shouting 'you can't stop me'. Molly intercepted the call and pretended to be the police and said that someone would be out immediately. Jack, Ianto, Gwen and Jamie, all headed as fast as they could to the SUV. Jamie making sure to take his medical kit in case he had to use something to subdue this man.

When they reached the address, they saw that the man in question seemed to be on some kind of rampage. He had blood on him from where it looked like he had been breaking the windows with his fist, all the while shouting about being kept prisoner.

'We take this carefully,' said Jack. 'Gwen, I want you to go to the neighbours and find out what you can. Ianto and Jamie with me.'

They approached the man carefully, but as soon as he saw them he charged at them, with a piece of glass in his hand, yelling 'You can't keep me here!'

Jack tried to stop the man, but he was knocked clean off his feet. As he went for Ianto and Jamie they both stepped out of his way to avoid ending up on the floor like Jack. The man stumbled and they went to grab him. As they went for him he lashed out and managed to scratch Ianto. Jack had got back up and this time managed to grab hold of the man, only just keeping hold of him while Jamie gave him a sedative. The man slumped unconscious to the floor and let go of the glass which Jamie kicked out of the way. Then as Gwen came back over they loaded him into the back of the SUV.

'I spoke to the neighbour, she says his name is Sam Green and up until today has been the perfect neighbour, but he just went crazy.'

'Ok when we get back to the Hub, I need you and Molly to run a background check on him and see how he could have got infected, and if he's linked to the man whose blood sample we saw. Jamie, I will need you to confirm that he is infected, but it seems pretty likely.' said Jack. He turned to Ianto and Jamie, 'Are both of you ok? He didn't hurt you, did he?'

'No', said Jamie.

'No, it's just a scratch. Barely broken the skin.' said Ianto showing his hand to Jack, and then Jamie.

'Just make sure you clean it when you get back.' said Jamie.

They all got back into the SUV and headed back to the Hub. When they got there, they put Sam into the cells and Jamie took some blood samples to run tests on. Gwen and Molly got on with trying to find out more on Sam. Ianto cleaned up his hand and then headed down to the archives, to see if he could find any other past cases. A few hours later, Jamie came up out of the medical bay and said, 'He's definitely affected by the virus.'

'No surprises there,' said Jack. 'Take a second sample and see whether anything has changed over time. We need to know if it gets any better or worse.'

'Sure, I have a few more tests to run first though.' said Jamie and he headed back towards the medical bay.

'Gwen, anything useful.'

'I know how he came into contact with it. Sam works with Dan Smith, the guy who's blood sample Jamie got sent. Sam was the one Dan fought with. I'm going back through some of the other arrest records of the incidents from the past few days to see if any of the others were connected to them.'

'Ok, that's a start, it's just something's bothering me. I feel like there's a bigger picture here and we're just not seeing it. We need to find the source.' Jack paused for a moment, then said. 'Is Ianto still in the archives?'

'Yeah, he sent me a message up a while ago saying he may have found something. I thought he was going to bring it up, but you what he's like when he's down there. I'll go and find out what it was.' said Molly.

Molly got up and headed down the stairs and along the corridor to the archives. As she looked into the archives she could see Ianto pacing up and down, like he had lost something. She stepped in and asked, 'Is everything alright.' When he turned and looked at her Molly could tell that something was not right, he looked panicked.

'No, it's not,' he said. 'I have to get out of here.'

'Why?' said Molly, trying to keep her voice calm.

'Because I have to get away.'

At these words Mollys stomach sank, and she hoped her imagination was just being overactive. 'What for?'

Ianto looked at her and then stepped closer, which made Molly take a step back. 'You're one of them aren't you, stopping me from leaving.'

'No, I'm not stopping you from doing anything, if you want to leave go ahead.' Molly moved so that the path to the door she had just come through was clear.

'You think I'm going to fall for that, it's a trap.'

Molly was now having a hard time trying to keep calm. 'I think we need to go and talk to Jack,' and she started to walk towards the door.

'No, he's in on it too, you're all in it together. I need to get out of here.' Molly heard something behind her and she turned to say something else only to find that Ianto was stood right behind her with his gun pointing at her. 'I need to get out,' he said again. 'And you're going to help me.'