The Doctor and Jack followed Rose as she ran back towards her Mum's flat.

"What happened?" Asked Jack panting as he and the Doctor struggled to keep up with her as she flew up the stairs.

"I don't know, I just went back and she wasn't there! The whole flat's been trashed!" Rose's voice wobbled precariously. In fact Jack was finding hard to understand his female companion.

They ran through the open door and the Doctor knew instantly it was no human attack. Rose sank into an armchair and just stared into space.

"I'll check the other rooms," said Jack leaving the Doctor to sift through the mess. Books, cups, bits of paper, furniture; it was all scattered everywhere. Rose started muttering to herself as the Doctor threw things out the way. He paused. There was a small pile of sticky green glue on the floor. He pulled out his sonic screwdriver and examined it. He didn't understand the reading. He'd never come across it before. That was what scared the Doctor most. He'd come across most things. The Doctor pocketed the screwdriver and gently prodded the glue with his finger. He hissed in pain as some kind of electric shock.

"Doctor, Rose, you might want to see this…" Jack called from the bedroom. Rose didn't move. The Doctor wasn't even sure she'd heard. He followed the sound of Jack's rummaging to Rose's room.

"Oh, no," he breathed. Scrawled across the wall in huge letters were the words 'Bad Wolf'. There was a small gasp from behind them and the Doctor and Jack spun round. Rose was stood wide-eyed looking at the words.

"It's fine Rose. It's probably nothing. A misunderstanding, your Mum will be fine!" Jack gabbled quickly steering Rose back to the living room. The Doctor knew it was all lies. Whoever had taken Rose's Mum had meant to do it and left the 'Bad Wolf' signature just to boast. The Doctor knew that the criminal behind this was hurting Rose because that hurt the Doctor more than anything else ever could.

"Doctor…" The Doctor could hear Rose murmuring in the other room and went back through. She looked worse, if that was possible, Jack was gently rubbing her back but it didn't seem to be making much of a difference. The Doctor took Rose's hands in his own and made her look at him.

"It'll be fine. Ok?" He whispered. Rose opened her mouth but couldn't answer. She knew the Doctor had no idea how to save her Mum, but Rose was moved by the fact he remained so positive. Just for her. "Everything is going to be fine."

"How do you know?" Rose asked, whimpering slightly. Jack could see they were getting a little too personal and backed away to look at the pile of green glue.

"I don't, but have I ever let you down?" The Doctor replied. Despite her tears Rose smiled. "Right, c'mon, if we're going to save your Mum we better get back to the TARDIS."

Rose nodded and glanced over at Jack who was poking the odd glue, which had grown by several inches.

"Jack," barked the Doctor smiling.

"Yes sir?" Asked Jack standing up and saluting mockingly.

"We're heading back to the TARDIS, get your butt down the stairs."

The three of them made their way back to the TARDIS a little slower than before.

"Do you know where we're headed?" Jack asked trying to ignore the fact that the Doctor and Rose were holding hands and standing closer, a lot closer, than normal.

"A planet somewhere in the vicinity of Belantic. I think that's where I came across it before." The Doctor replied as the reached the TARDIS. "The TARDIS'll be able to tell us exactly where."

The Doctor opened the doors and the three of them stepped inside. While he was typing the reading into the TARDIS control panel Jack tried to comfort Rose.

"You know the Doctor will sort it out Rose. He'd follow you to the ends of the Earth, well I should say universe." Jack chuckled and Rose smiled slightly. "He worships the ground you walk on Rose."

Rose wanted to believe Jack when he said that, but she knew in her heart that the Doctor's feelings would never reach beyond the point of very close friends. And even if they did he would never tell her, she was sure he'd find it too difficult to accept.

The Doctor banged the console in frustration.

"The TARDIS can't locate the signal." The Doctor glanced at Rose but didn't hold her gaze. He couldn't bear to let her down.

"It's ok," Rose stood up and wandered over to the Doctor. "The planet's got a Jillagean field round it. That's why you can't locate it. The coordinates are sector eleven Q five by seven, next to Fallpotos."

The Doctor stared.

"How did you know that?" He asked quietly, frowning.

Rose seemed to come back to her senses.

"I dunno, it's like I already knew…" Rose shook her head as though trying to dislodge water from her brain.

The Doctor set in the coordinates and Rose sat back down. It took the TARDIS ten minutes to materialise on the planet after figuring out how to counteract the force field around it.

The Doctor stepped outside and muttered an audible 'oh'.

Rose and Jack followed quickly.

"What is it?" Asked Jack. "Ah."

Rose saw what they were looking at.

There were three tall scaly creatures holding them at gunpoint.

"There so friendly," the Doctor smiled taking Rose's hand.

"Now we know why they had a force field around them," muttered Jack.