Martha was running, the metallic shrieks of the Daleks filling the air. She risked looking round and seeing one of the metallic monsters round the corner she increased her pace; she had to lead them away from Ianto and Gwen.

She skidded round a corner and seeing an open door she dived inside, pushing herself as far into the shadows as she could and holding her breath, whilst trying to calm her racing heart.

She tensed as she heard the whine of the Daleks' servos as it approached the open doorway.

She almost gave herself away as it stopped and she could hear its head swivelling. She was about to move when another Dalek spoke.

"All Daleks to Level Fifty, the Doctor must be exterminated!"

She held her breath as the first Dalek replied. "I obey."

The sound of the two Daleks faded, but still she waited. Her heart ached as she knew what was unfolding way above her, how her own future was being set in motion. No, she thought, think of now, they had to get off this place.

She stood up and before she could take a step, the space around her shimmered and she was somewhere else...somewhere...no not somewhere...no-where.

She looked round, there was nothing but darkness, yet, she felt like she wasn't alone.

Then she heard a voice.

"Martha."

Ianto guided Gwen into what looked like a side corridor. He hadn't liked the idea of leaving Martha to act as bait for the Daleks. He'd just settled Gwen, who was now beginning to stir and let out a groan.

Ianto placed a hand over her mouth. "Ssh, hush now," he said as he tried to listen for the tell-tale sound of a metal monster. What he did hear was the voice of the Daleks, they grated on his nerves.

"All Daleks to level fifty, the Doctor must be exterminated!"

Ianto's heart stopped, he knew what happened on that level, knew what it meant to Jack, knew the consequences, knew that he couldn't interfere.

"I'm sorry Jack," he whispered as the sounds of gunfire echoed.

He looked over at Gwen and frowned, was the air shimmering around her. He blinked and then he realised he wasn't on the game station anymore...it was dark and he was alone.

"Gwen?" he said into the darkness. "Gwen?"

There was no reply and he strained to see in the darkness, but he had the feeling he wasn't alone.

He jumped when he heard a voice come out of the darkness.

"Ianto."

Gwen groaned and opened her eyes, the lights must be out, it was dark. She shifted to try and make herself more comfortable. It was then that she realised that she wasn't on a hospital bed.

In fact she realised, she was in complete darkness, no not darkness, it was black. She felt round with her hands.

The surface felt solid, but that was no guarantee that it was. She tried to stand but a wave of dizziness made her go down again.

It was then that she got the distinct feeling that she wasn't alone. Then a voice whispered in the darkness.

"Gwen."

Jack watched as the figure inside the container raised an arrogant eyebrow as the sounds of battle became louder.

"You might as well take your weapons and destroy yourselves now. It will be a better death than that which will await you."

Jack watched as his future self ignored the figure and spoke only to Martha.

"Go now, find what's left and retreat to the bolt hole. You know what you have to do, use the key. Don't let them get this planet."

Martha nodded and leant in and kissed Jack. "Bye Jack," she said and moved away and disappeared out of the only other door.

The future Jack moved over to a panel on the wall. He entered what looked like a code. He turned back to the figure inside the container.

"You don't give me any choice, I'm sorry," he said.

Jack heard a hiss of air and looked back at the container. He watched in increasing horror as the figure in the container began to cough and fell to his knees.

The door exploded inwards, shattering his tunnel vision.

He whirled round and pedalled back into the shadows as very familiar shapes appeared through the smoke.

"Exterminate!"

The whiplash sound of a rake of laser fire filled the air and Jack flinched as he future self fell, his body momentarily light by a green hell.

Another rake of fire shattered the front of the container, and the figure inside fell forward, gasping for air.

The figure struggled to his knees and steadied himself on the Dalek that had killed the future Jack.

The figure drew himself to his full height and looked into the Daleks eyepiece. "Do you recognise me?"

The Dalek eyestalk moved for a few seconds. "You are the Doctor, you are our saviour. We await your orders."

The figure looked at the still dead body of the future Jack.

"Exterminate them, exterminate them all!"

Jack turned away from the scene and paled, the Chaos was gone, but a voice echoed in his mind.

"You have a choice Jack Harkness, let me have this body, the power it contains and I will stop this, or you will have to finish what your future self could not...kill the Time Lord."