The three Tau'ri members of SG1 stepped out of the wormhole and onto Dakara.

'Woah.' Mitchell held his hands up as the Jaffa guarding the gate aimed their weapons at the travellers.

'Kel ma ghe!' Teal'c stepped forward and the weapons were lowered. 'It is good to see you Colonel Carter.'

'It's good to see you too, Teal'c.' Sam greeted him with a smile. 'Is everything ready?'

'Indeed.' Teal'c bowed his head and acknowledged Daniel and Mitchell with a brief glance. 'I have organised transport for us. It is this way.'

They began walking and Sam kept stride with the Jaffa as he led the way. She was surprised to see Tok'ra and Jaffa talking and running together as they prepared for the upcoming battle. 'Delek came through on his promise.' She muttered in wonder.

'I am as surprised as you, Colonel Carter.' Teal'c said. He turned to her. 'We have been unable as yet to confirm the presence of the Replicator.'

'She's cloaked but Daniel's been working with Thor on a way to find her.' Sam said. 'We think we should be able to pinpoint where she is.'

'And you are certain she is at Dakara?' Teal'c asked.

'I know she is.' Sam said defensively.

'I believe you, Colonel Carter.' Teal'c said. His warm brown eyes held hers for a moment. 'She is no doubt after the weapon.'

'We think so.' Sam confirmed.

'We must prevent the human form Replicator from completing her mission.' Teal'c responded. He pointed out their ship and they got on board with swift efficiency.

Sam took a deep breath. 'OK, guys. Let's get this ship in the air.'

'Won't the Replicator realise we're onto her if we launch?' Mitchell said taking one of the pilot seats as Teal'c took the other.

'No.' Sam said taking her laptop out of her bag. 'I'm going to input a programme to emit false bio-readings; if she scans us we'll be four Jaffa. If we join the rest of the ships, she'll hopefully think we're just another ship joining the fight.'

'OK.' Mitchell rubbed his hands at the controls. 'So how do I fly this bird?'

'You do not.' Teal'c said firmly.

'Aw come on, Teal'c.' Mitchell turned to him with a pleading expression. 'I haven't been flying in ages.'

Teal'c looked over at the eager enthusiasm in his blue eyes and noted it was not unlike the eagerness Daniel Jackson or Colonel Carter displayed when faced with a new puzzle. He had eight years of practice at resisting that look. He turned back to the controls and made them air-borne. 'No.'

Sam and Daniel exchanged an amused look at Mitchell's crushed look as they worked on interfacing Sam's laptop with the scout ship systems.

'OK,' Daniel said, 'if you bring up the sensor readings Thor took, we think we identified a small distortion in space that we need to look for.'

'This is going to be like finding a needle in a haystack.' Mitchell murmured coming to stand next to them.

'Not necessarily.' Sam smiled grimly. 'I know how she thinks and I know where I would be hiding.'

'And if she works out that you've come after her?' Mitchell asked.

'Then we'll check where I would hide if I thought I was searching for me.' Sam's brow creased. 'You know what I mean.' She brought up the scanning programme and tapped in the instructions as Teal'c took them into a holding position behind another Jaffa ship in orbit.

It turned into a tense wait while the scan did its work. They had almost reached the time they suspected Ba'al and the Replicators would strike, and Sam was beginning to doubt her strategy, when the computer beeped. She and Daniel got up from the floor and hurried over to it. Mitchell joined them as Teal'c kept the ship steady.

'Got you.' Sam tapped the screen. 'She's there.' She looked at Mitchell and Daniel. 'Let's gear up. I want us to be ready to move.'

'How are we going to ring through the cloak?' Mitchell asked.

'We think the anomaly is a fluctuation in the cloak.' Daniel said.

'You think?' Mitchell asked alarmed. 'You're not sure?'

'If we time it correctly we should be able to use it to get through the cloak.' Sam confirmed as they put the protective vests on over the black t-shirts and picked up the P90s. She returned to the laptop. 'OK, guys.' She said. 'Teal'c, you'll stay here and wait for us. Mitchell, Daniel, you just need to find the General and keep the rest of the Replicators away from me and my duplicate. As soon as you get him, come back here. I'll follow as soon as I've dealt with her.'

'Exactly how are you going to do that?' Mitchell asked.

'Yeah, how are you going to do that?' Daniel asked worriedly.

Sam avoided looking at them. 'Trust me. I have a plan and I don't intend letting her win.' She gestured at the rings. 'The rings will automatically activate the next time the cloak fluctuates.' She hit the enter key.

Mitchell and Daniel got into the circle and Sam joined them. The rings surrounded them and in a flash of light they were gone. They reappeared on the cargo ship the Replicator had procured from Ba'al. It was already covered in Replicator blocks giving it an empty and sterile appearance except for the one other living thing in the cargo hold; Jack.

'Cover me.' Sam ordered as she hurried over and felt for a pulse. Jack's brown eyes snapped open at her touch and he grabbed her wrist. She tried hard not to wince at the strength of his grip and knew she would have a bruise the next day; she tried hard not to take the look of hatred in his eyes personally. 'Sir?'

The sound of her voice seemed to trigger something in his head that she was different.

'Carter?' His voice was disbelieving. His eyes narrowed on hers and searched the blue depths.

'It's me. It's really me.' She let go of her gun laying it on the ground to cup his rough cheek with her free hand. 'Five days.'

'Five days?' He asked a little absently as though he still couldn't believe she was there.

She smiled. 'I'm still counting, sir.'

His brown eyes smiled at her for a moment before he sat up abruptly letting go of her. 'So what's the plan?'

Sam was about to reply when the door slid open and the human form Replicator entered. There were bugs following her like excited puppies, the sound of their clicking filling the small room.

Daniel flinched; the last time he had seen her, she had killed him.

Mitchell blanched at the similarity to Sam.

They both backed up from the door, their P90s fixed to the Replicator, and took positions either side of their team-mates.

Sam got to her feet and faced her copy with a defiant look. 'It's over.'

The Replicator smiled. 'It is only just beginning.' The two women began circling the room like prize fighters in the ring.

Daniel reached down and helped Jack to his feet. Jack grabbed Sam's discarded P90 and joined the other two men in pointing the weapon at the Replicators.

'You won't win.' Sam said calmly.

'Ba'al has begun in his onslaught on Dakara.'

'You don't care about Ba'al. You plan for him to waste his resources keeping the Jaffa occupied while you try to get the Ancient weapon.' Sam responded. 'Just like you tried attacking Earth to keep us, keep me, out of the way.'

'My brethren are at Earth which I see you have left defenceless after all.' The Replicator smiled.

'Not defenceless.' Sam corrected.

The double regarded her coldly. 'The Asgard are no threat; I will soon have control of the ship they left there.' Her head tilted suddenly. She smiled cruelly. 'An invisible iris. Clever.' The Replicators at her feet moved angrily. 'And one whose frequency changes with each of my brethren.'

'You should give up.' Sam said. 'Thor integrated the technology into the Asgard shields. The Replicators can't board his ship.'

Her double frowned.

'You're probably realising that the Asgard are jamming your transportation systems too.' Sam said as they continued to circle almost lazily around the room.

The Replicator's face tightened with fury.

'I decided to tap into some of that greatness you told me about.' Sam taunted casually.

The face of the other woman smoothed out. 'No matter. Earth can wait. It will be destroyed when I retrieve the Ancient weapon and rid this galaxy of life.'

'I'm afraid not.' Sam said. 'I actually have a counter-measure for that too.'

'I can overcome it in time.' The Replicator responded. 'All I need is the weapon.'

'You can't have it.'

'I will have it.'

'You need to know how to get to it.' Sam baited her. 'There are only two sources for that information. The Ancient systems which you can't access because the power's gone and you don't have the knowledge to revive it.' Her blue eyes met the hard glint of an identical set across the room. 'Or me.'

'Carter.' Jack's concerned voice whipped across the room.

'And here you've delivered yourself to me.' The Replicator smiled. 'This is going to be fun.'

'Everybody else, out!' yelled Sam as the double charged straight for her. She grabbed the Replicator's raised arm as it aimed for her head and the two versions of Samantha Carter froze; the human's hand around the Replicator's arm.

Jack looked at Daniel. 'This was the plan?' He asked sarcastically.

'We didn't say it was a good plan.' Daniel muttered.

The Replicator bugs began to move in their direction and Jack fired off his weapon, Mitchell and Daniel followed suit.

'Sir, Colonel Carter ordered us to leave.' Mitchell shouted over the noise of the gunfire.

'I'm sure it says General on my uniform, Mitchell.' Jack said. 'And we're not leaving without Carter.' He allowed himself one brief anxious look at her in the grip of the Replicator before he went back to shooting the bugs.

Sam was back in the same dark room that the Replicator had taken to her the last time she had invaded her mind. The same spotlight cast the two of them in its eerie glow.

'You really do have a lack of imagination don't you?' Sam said looking around at the dark space.

'You can't really think you'll win.' The Replicator bit out. 'I'm already in your mind. I'll discover the way to bring the weapon back.'

'I'm sure you will.' Sam smiled. 'But I'm in your mind too.'

'You can't…'

'I can't what?' Sam asked. 'Control things? Guess again.'

The scene around the changed abruptly; they were standing in front of the Stargate in the SGC.

'And you accused me of having no imagination.' The Replicator sneered.

'Welcome to my turf.' Sam said her blue eyes gleaming with satisfaction. She tilted her head. 'Aren't you wondering why the Asgard haven't fired on your ship yet?'

The Replicator frowned. 'You miscalculated. I had other Replicators go through the Stargate first. The ship arrived simultaneously.'

'And because you went through the Stargate, the cipher I helped you create automatically changed the frequency rendering the disruptor weapon on Thor's ship useless.' Sam agreed cheerfully. 'I know.'

'You are distracting me.' The Replicator realised.

'You're the one who miscalculated.' Sam confided. 'I have them now; your brethren.'

Sam allowed them to see through the Replicators in the cargo ship; they were stood frozen in front of the three men who remained in the cargo hold. Sam saw her team-mates confusion at the Replicators stopping before they shrugged and began firing again. She smiled.

'I should thank you.' Sam said casually. 'For kidnapping Daniel. If you hadn't, he wouldn't have gotten into your mind and I wouldn't have known I could do this.' She smiled. 'And, of course, for ascending. If you're wondering how I'm managing to keep control in here, well, that's down to one of the Ascended beings. You must have really annoyed them for them to agree to one of their own interfering.'

The Replicator glowered at her; she could almost feel its cold logic trying to rifle through her thoughts. Sam mentally slapped her back and shook her head. 'Naughty, naughty.' She wagged a finger at the Replicator. 'Play by the rules, remember? And besides, quite honestly, I'm not sure what Orlin did so there's no point looking. Now, let's see about that cipher, shall we?' Sam asked breezily.

The scene changed to Sam's lab. She walked over to the computer monitor and brought up the code. She selected the cipher code and pressed delete. The immunity the Replicator had created with Sam's help against the disruptor weapon disappeared from all the Replicators. Sam smiled in satisfaction.

'I can recreate the code.' The Replicator said furiously.

'Not fast enough.' Sam said smugly.

Sam used the Replicator ship itself to transmit the required frequency to destroy it to Thor. She smiled sympathetically at the Replicator. 'You should brace yourself. Your brethren are about to be toast.'

'You don't have a weapon here.' The Replicator snarled feeling the instant loss of the ship thousands of light years across the galaxy. She charged across the room to Sam.

Sam grabbed its arm in a mental parody of their real position. She flung them out of the mental space and into reality…

Sam's eyes snapped open and she stared at the confusion on her duplicate's face. 'Haven't you got it yet?' She asked almost innocently as she used her control of the Replicators, within all the bugs across the galaxy, to severe the connection between their cells. They fell into inert dust. 'I am the weapon.'

Her duplicate watched in horror. Her eyes met Sam's and the Air Force Colonel saw a glint of fear before the human form Replicator disintegrated into a million inert blocks leaving Sam's hand clutching air.