"I know this is tough, i honestly do but you can't stay here. I'm sorry but you just can't." Rose said sympathetically. Torchwood was on a mission, surprise surprise! There had been reporting's of young human males having all of the energy sucked out of them, left for dead basically. It was a case that had been handed over to Torchwood because nobody could explain how it had been done, there was no way a human could do that to a teenage boy. Rose and John had set to work on it immediately and John had remembered a similar story that he had faced on the planet Huplot. Huplot's citizens, Tremoka, where animal like. They were similar to that of a bear, big strong animals. They could run through the forest at a phenomenal rate and catch anything it liked. However, they had been finding young male Tremoka lying on the floor, alive but with no energy at all. After a while the Doctor discovered that a secret race called the Convergies had been staying with the Tremoka. The Convergies where a very old, very powerful race. All most as old as the Time Lords. They had the ability to take on the appearance of any particular race they wanted and could blend in extraordinarily well. The only problem was their heart was extremely weak, and if they did not find an energy source to feed on, could pass out on them at any time. So the Tremoka would pick the strongest members of the race they had chosen to blend with, and suck out their energy taking it for themselves. Depending on how strong their victim was, the Tremoka wouldn't have to feed again for as long as they had energy.

John had recalled this to Rose and together they had tracked down a female Tremoke, living in Surrey. When Torchwood had reached her flat they had found her there with her boyfriend watching TV. It turned out the boyfriend, Tom, knew about 'Penny' but because of his love for her he had no problem with how she survived.

"Look, Penny, i understand why you want to stay here but it's not fair. It's not fair on those you're taking energy from. Torchwood has a satellite. It can take you back to your homeland, where you have fruit you can feed on to energise." Rose told her smiling softly and sincerely.

"No!" Penny hissed, "I want to stay here. I left my planet so i could travel, see new places. I will never go back, besides i never kill anyone. I'm not a murderess." She smirked.

"No, but you might as well be," Rose shot back "Those boys now all have heart conditions that could kill them at any minute. They can't be teenage lads anymore, can't play a bit of footie, can't go out for a drink with the blokes. They can't do any of that. Because of you!"

Penny lurched forward suddenly grabbing Rose's leather jacket and pulling her towards her. John stepped forward protectively. Rose lifted her hand up to stop him her eyes fixed on Penny.

"I know of you," Penny whispered for Rose only "He left you here, with an echo of himself. I love Tom like you love the Doctor. Please don't take him away from me, I cannot live without him. Rose Tyler I am begging you. Please." Rose's gaze had turned hard as soon as Penny had started to talk of the Doctor. But beneath the coldness of her face was only pain. He had left her here with a man who was not him. But she refused to think of him, reminding herself of him only hurt. She pushed out of Penny's hold and said coldly. "You should not have come here Penny, there was always a possibility of you falling for a human. You have yourself to blame. I can't allow you to stay here whilst there are people at risk. If you will not come willingly, I will make you." The harshness of Rose's tone made Penny understand her situation. She turned around tears rolling down her face.

"I love you Tom," She whispered "I will never forget you,"

"I love you," He sobbed back.

Rose turned away from them and faced the wall. She was biting back her own tears. Penny walked towards Ian who was holding the handcuffs and without turning around walked out of the flat. Rose followed quickly after Ian, she couldn't look Tom in the eye. On the road she stood outside the house, and breathed deeply in and out. She felt a hand touch her back and turned to look into the worried eyes John.

"You alright?" He asked quietly.

"I'm fine," She replied but the words sounded flat and forced to her ears as well.

"Okay, well shall we go?" John gestured to the car waiting.

"Yeah, let's get out of here." Rose said and got into the car. The ride back to HQ was quiet and awkward. Rose stared out of the window not seeing the people or houses. Guilt was building up in her stomach, she had let what Penny say effect her. She had not been thinking rationally when she had forced Penny out of the house. She would have tried to have found a way for it to make it work between them. Sighing Rose stared at John. What would the Doctor have said?