What Emily hadn't seen was the Doctor leaving Rose at her new room door. Rose had gone into the room and found mostly what she wanted and doubted she'd have to go make a trip to find the wardrobe she'd been told about. She wondered what had come over her sister earlier and the way she had acted. Emily had been all for the old Doctor but now, she still didn't seem to believe it was him and her saying she was tired, some excuse that had been.

The Doctor had gone back to the console room, he dimmed the lights and sat on the worn-out seat, not bothering to set off anywhere in case either of his guests decided to leave in the morning. While he travelled with human companions, well recently, he tried to keep to earth time as much as possible, except for the unfortunate mistake of taking Emily back a year late but that concerned him more than ever now.

Would Rose and her mother ever get over that? Would they forgive him? Well Rose seemed to be doing so, at least up to press but he was letting his guard down with her, more than he had done with Emily or even Sarah-Jane, what was happening to him? He shook the thoughts off and tried to concentrate on where to take the two sisters once it had been decided if they were both staying. Maybe a trip to 'New Earth' might be in order? Nothing like apple grass to impress his now two companions.

Something made him take his psychic paper out of his jacket pocket, the article had impressed Rose and had made her blush when his hands had been full and he'd got her to take it out of his pocket, he didn't normally keep it where it had been but he'd been in a rush to secure the turkey. It made him smile thinking about it, until he saw a message appear on the piece of paper.

Who did he know who would be in a hospital on a planet he'd aptly named New Earth? There was only one way to find out but he had to make this look like it wasn't planned. Was it purely coincidence he was just thinking about the place and he'd got a message or was there something else to it?

The feelings he had been getting were now stronger than ever and it had only been since being on the Sycorax ship, why had Rose suddenly become so important that he'd gone against Emily's wishes and asked her to join them? True, she did deserve a reward for helping save her planet and him, was she always going to rescue him? Emily had her moments, she'd saved his ass countless times, he'd done the same for her when they'd got into trouble, he knew he'd have got himself out eventually but still, it counted for something.

Now he wondered how the two of them would get on, Emily being away from home all that time and them both being in close proximity. He just hoped they wouldn't fight all the time, he didn't fancy having to break them up and sustain a few injuries in the process, like a black eye or two. He smiled to himself at the thought though.

What was the next morning to Rose, she woke up and could smell food, realising she was hungry. She got dressed, choosing some jeans and a pink t-shirt and not knowing which was her sister's room, followed the smell to find Emily and the Doctor laughing and joking over something in the galley, sitting at a large table laden with every breakfast item known to mankind.

"Wow, someone's been busy," Rose said cheerfully, sitting next to the Doctor as Emily was sprawled out.

"Good morning Rose, you slept well then?" he asked, passing a plate to her. "Help yourself and no, it was waiting for us when we arrived."

"So you have a secret cook on board then?" Rose smiled, helping herself to anything that looked like it belonged on the plate.

"Weeell, not exactly, the ship sensed you'd both be hungry when you woke up."

Emily looked at him – before he'd changed and she had been grounded, it had been something that resembled shredded wheat topped with strawberries and bananas the other Doctor had placed out for her. Why had the ship suddenly turned out to be a master chef? She was still having trouble getting used to him without his northern accent and being so cheerful when she'd woken up and swore she was back in her mother's flat with the place smelling of bacon and eggs but when she'd seen the spread on the table, she'd almost fainted.

"So, where are you takin' us?" Emily asked, seeing the Doctor looked smug the ship had impressed Rose.

"Ah, right. Nothing you two want to fetch from home then?"

They both shook their heads.

"Not even to say goodbye to your mother?"

"Why, how long are ya gonna keep us away?" Rose asked, forgetting about it being rude to talk with her mouth full. She saw the Doctor smiling and realised. "Sorry."

"As long as you both want to be. I was thinking about taking you to another galaxy, M57 to be precise.

Rose giggled. "Sounds like a motorway."

"It's nothing of the sort, I'll show you, Rose Tyler."

He got up and left, pretending to be in a huff but wasn't really, he just wanted to make sure he landed where he wanted to take them, not where the Tardis herself wanted him to go – for a change but since he'd got that message, he was fairly sure the old girl would oblige, even if he was only trying to impress his latest companion.

He adjusted a few dials, pulled a few levers then released the handbrake – his first real trip since regenerating and he grinned at the thought but what got him the most was that same feeling and he was glad Rose had agreed to go along with them, this was going to be great!

Back in the galley, Rose was about to leave.

"Happy now?" Emily asked as she watched Rose.

"What's wrong with you Emm? You've been like this since you woke up after missing all the excitement."

"Nothing, I'm surprised the Doctor didn't want to drag Mickey along as well."

"What did you expect me to say? That I'd think about it?"

"Well you could have done."

"Yeah, then he might not have asked me again."

Emily thought maybe not, she'd been lucky he'd asked her again. Rose had just got to the doorway when she was called back.

"Don't get used to it Rose, it will be tea and toast tomorrow morning, if we're even still on board. You never know where we're gonna be at any given time, not really."

"I don't mind, it sounds exciting."

Emily walked up to her. "You two were getting cosy last night."

"What? Is this what it's all about Emm?"

"I'm just saying. Where did you both get to, when you brought that food back?"

"We just went to this old market, that's all. That paper he has is good, we never paid for anything."

Rose felt herself go slightly red, remembering having to retrieve it from his pocket.

"So did he see you into your room then?"

"Stop it Emily, you know you've changed?"

"I've changed? He's the one who had to go changing, there was nothing wrong with the way he was."

"Yeah, you never took any notice of him then, did you?"

"That's not fair Rose, he was my friend and I thought I knew him. We weren't like that, despite the police asking me all those stupid questions when I came back from what you called my kidnapping."

"That was entirely mum, not me. How do ya think Mickey felt? He got hauled in more than once, mum was convinced he'd done you in."

Emily forgot her jealousy for a minute. "Well, I wasn't pleased he carried me down to the Tardis."

Rose burst out laughing. "Stop it Emm, I'm not tryin' to hog the Doctor, honestly but what am I supposed to do? Last night, he was just tryin' to make me feel welcome."

"Giving you a hug?"

"How'd ya know that?"

"I saw you, I heard you passing by my room."

"You could have said something then."

"Yeah, then he would have said something to me."

"This ain't solving anything Emm. Lets just both make the best of it, I'm not fighting over him."

"You say that now Rose."

Emily pushed past her and headed to the console room. The Doctor noticed her mood but didn't know whether to say anything or not.

"Where's Rose?" he asked after hesitating.

Emily shrugged her shoulders. "How would I know? She's probably wandering around the corridors, you left me to explore."

"I know I did, I just didn't think you'd want the guided tour."

Emily was about to say she wouldn't have minded when Rose entered.

"There you are Rose. Right, off we go then, hold tight!"

Rose thought he was joking as the ship seemed to be struggling to keep upright but she soon found her balance and grinned.

"Is it always as rough as this?"

The Doctor just grinned. "Nah, it's sometimes worse, right Emily?"

"Yeah, says a lot about your drivin' Doctor."

"Thanks for that. See what Rose thinks."

"If we get there in one piece."

Rose was wondering if they were always like that or Emily was having a dig because she'd seen the Doctor hug her last night. Finally, there was a 'thud' and they had landed, the Doctor bounding down the ramp. Rose had gone off to get changed again, not happy with the t-shirt and had just come back.

"Come on Rose, you don't want to miss this," the Doctor called behind him, Emily almost colliding with him.

"What's that smell?" Rose asked as she joined them, the door closing behind her.

"Apple grass."

"Really? This is great, thanks Doctor," Rose grinned at him, taking his arm. "I'm sure I'm gonna love travelling with you but how long can I stay?"

"As long as you want, eh Emily?" the Doctor grinned back, pulling her along and grabbing Emily's arm.

Emily just muttered a "Great" under her breath, convinced now Rose had travelled with them, she would be unable to leave or maybe she'd stay, just to annoy her and spoil everything.

They went to find a spot to sit down, the Doctor putting his coat down and holding onto Rose as she kneeled down but Emily just huffed and sat to one side, watching the hovering craft fly over them.

"So what's that place called?" Rose asked, indicating the large city across the river.

"That is new New York."

Rose nudged him with her elbow as she propped herself up, the Doctor now laid with his arms under his head.

"You're having us on."

"No, really, it's the city of new New York although technically speaking, it's the fifteenth so it's new, new, new…"

Rose stopped him. "OK, I'm convinced. So how do we get over there?"

"Well, we'll get a lift but first we have to go there."

He indicated to two identical buildings, one with a green symbol on the side.

"What's that place?" Emily asked, sitting up and taking notice.

"That's the universal sign for a hospital, I got this message, on the psychic paper."

He fished the wallet from his inner pocket and showed it to Rose. 'Ward 26, please come.'

"So, who are we gonna visit?" Rose asked, indicating for the Doctor to help her up, getting her a look from Emily, who just got onto her knees and got herself up.

"I've no idea, more fun that way."

"There was I thinking I'd get to see the city," Emily moaned.

After the Doctor complained there was no little shop in the hospital foyer, Rose staring at the cat nuns who were running the place, Emily missed the lift they had got into and had found herself in the basement, encountering Cassandra, who was out for vengeance from platform one and took over her body, Emily being helpless to resist.

Rose and the Doctor had no idea what was going on until Rose called her sister, saying to the Doctor that Emily sounded weird.

"What do you mean by weird Rose?" the Doctor asked her looking at a man who was all red and placing his specs on his nose, Rose thinking he looked cute.

"She was talking all rhyming slang and laughed. What's that?" she asked, looking at a large glass container near the window.

"That's The Face of Boe, come and say hi."

A cat nun approached them.

"Are they all cats around here?" Rose mused, wondering what was taking her sister so long and if she was stalling on purpose.

Emily finally stood in the doorway, looking around but Rose noticed there was something different about her.

"There you are Emm, where did you get to?"

"Nowhere, you two went off and left me."

"Sorry, the door was on automatic."

"Emily, you remember The Face of Boe, don't you?" the Doctor asked.

What had once been Emily laughed. "Of course I do, who could forget that big old face?"

The Doctor looked at Rose, as if to say he got what she had meant about Emily sounding different. Cassandra knew she'd been discovered and while the Doctor was looking at the entity who had called him there, she took the chance to escape and took over Rose, who was hardly in any position to stop her. The Doctor turned around as Emily stumbled.

"What's going on here?"

"Nothing," Rose, or now Cassandra told him, grabbing hold of Emily.

"I feel weird," Emily admitted, sitting on one of the chairs, trying to remember what had happened and how she'd got there.

"Well I say something is going on around here," the Doctor told the two of them. "Let's see what this lot are up to, coming Rose?"

"Oh don't bother about me, I'll just sit here," Emily complained, wishing someone would offer to fetch her a drink of water.

The Doctor led Rose to another part of the ward, watching her carefully.

"What's wrong with first Emily, then you?"

"I have no idea what you mean, I was just larking about, you know, New Earth and all that."

"Yeah, well I can talk, new, new Doctor," he grinned as Rose stepped closer.

"Mmm, aren't you just?" she told him, licking her lips.

Suddenly she grabbed his collar and pulled him into a passionate kiss, just in time for Emily to see.

"Rose! What the hell are you doing?" Emily demanded to know as Rose finally let him go, the Doctor still in a daze.

"T-terminal's this way," who the Doctor was now convinced wasn't Rose stuttered as she walked off with a satisfied look on her face, wafting her hand.

"Huh, still got it," the Doctor said out loud, well loud enough for an even more jealous Emily to hear.

After accessing the installation grid and gaining access to a secret part of the hospital, the Doctor looked down at all the cells after opening a few and Emily feeling sick, Rose declaring she had better not catch anything from the humanoids who had been infected with every disease in the universe. One of the cat nuns, the one who was looking after whom the doctor had got the message from approached them.

After Rose had tried to find out a few things, the Doctor called time on Cassandra's little game.

"What have you done to Rose?"

"Nothing, I'm fine."

"Who are you?" he asked as Emily left with the cat nun to get someone in charge, Emily only just registering she had escaped being held hostage by whoever was now possessing her sister.

Rose approached him again, going for his tie and pulling it out, straightened it.

"I knew these cats were up to something but I needed a body and your mind to find out what it was."

"What? Tell me who you are."

"The last human," she half whispered, spraying something in his face and him collapsing on the floor after saying her name.

She dragged him to an open cell and locked the door just as Emily came back followed by two other cat nuns. After failing to negotiate with them, Cassandra reverted to plan B and opened all the cell doors, the Doctor being the first one out after protesting and Cassandra telling him to be quiet and that she'd been dying to get her revenge on him, a thousand times over.

The Doctor grabbed Emily and ran. Rose, still possessed had been joined by Cassandra's assistant, Chip and was close behind them as the alarms sounded and Chip getting cut off by the infected hordes whom had been set free. After making it back to where Cassandra had been hiding out, the Doctor turned on her.

"Give Rose back to me."

"I've nowhere else to go, my skin is dead," she half cried, indicating the empty frame.

"Not my problem."

"Very well, you asked for it," Cassandra stated, going back into Emily again.

"That's not going to work Cassandra, you can't have either of them."

"Spoilsport," she laughed, lurching forward and escaping to enter the Doctor, who looked surprised.

"Look at me, I'm a man. So many parts, some hardly used. You were looking at him, you think he's a little bit foxy, what was your name?" she asked Rose, who was trying not to laugh, unlike Emily.

"Get out of him, whatever your name is," Rose demanded.

"She's Cassandra, we've met before," Emily informed her.

"I remember you, Emily Tyler, I've been waiting for you and the Doctor to cross my path again and now I have my revenge."

Just then, the door opened as the infected patients had found them. The Doctor saw a ladder and pushing Rose out of the way, ran for it, climbing up.

"Emm, quickly, go," Rose urged her sister, who remained where she was.

Grabbing hold of her she half pushed her up the ladder, climbing onto it herself. They had got so far when one of the nuns caught up with them.

"You've destroyed all our hard work."

"Oh go play with a ball of string," Cassandra declared.

Suddenly the nun let go of Rose's foot and fell down, Rose seeing the infected people below.

"Cassandra, open the door," Rose urged as the Doctor was pulling a face.

"With what?"

"With that sonic thing."

He reached into his jacket pocket and brought the sonic screwdriver out. "You mean this thing?"

"Yeah," Emily assured him.

"I don't know how."

"Then go back into me or Rose and let him open it."

"Hold tight."

A light mist floated downwards, missing Emily and landing in Rose.

"Now open it," Rose, now Cassandra demanded.

"Not until you leave Rose and not go into Emily."

Rose looked below her at a female patient. "Oh I am so going to regret this."

The Doctor saw what was happening and hurriedly opened the door, pulling Emily up and waiting for Rose.

"Oh no you don't," the female patient called out, Cassandra going back into Rose again as she scrambled through the door and the Doctor caught her, just as it closed.

She sat down, Emily and the Doctor looking at her.

"They're so alone," Cassandra declared.

The Doctor held out his hand to help her up, Emily watching. They got back to the ward, getting attacked by the assistant of the Duke of Manhattan and the Doctor came up with an idea.

"Get me every solution you can find Emily, you too Cassandra."

While they were doing that, he was making a rough pulley to get back down another lift shaft, then tying a cord around himself, they began attaching the plastic bags containing the various coloured solutions onto it. He opened the door, making sure there were no patients around and leapt for the lift cable, using the sonic to attach the pulley.

"What do you think you're doing?" Cassandra asked, still in possession of Rose.

"You're so desperate to stay alive, why don't you live a little?" he asked, wiggling his eyebrows.

"On that thing? Not in a million years."

"They're heading this way Doctor," Emily warned as the patients got nearer.

She pushed Cassandra, who found herself with her arms around the Doctor. Once they had reached the bottom and landed on top of the lift, he began opening the plastic bags and poured the contents into the tank.

"Hold that lever still," he told Cassandra.

"Why, what are you doing?"

"Just hold it still, I have patients to see, the Doctor is in," he declared, opening the hatch and jumping down.

He called everyone towards him, Cassandra struggling with the lever.

"Don't tell them," she called down.

When the solution had soaked him and those in the lift, they then spread the cure on to each other. The Doctor helped Cassandra down, declaring a new sub-species.

"You can't deny it Cassandra, you helped create them. Now, back upstairs, you can't stay in Rose."

Once back, he now had to deal with getting Rose back.

"Can't you just leave me?" Cassandra pleaded with him.

"It's time to give up, hand you over to the authorities, they'll make you a skin tag."

Just then, her assistant found them and Cassandra saw her chance, jumping into Chip and letting Rose go.

The Doctor just managed to catch her – twice.

"Whoa, steady on Rose. Welcome back."

"Hi," she grinned back at him, stilling clinging to him, Emily rolling her eyes.

The Doctor said he could do one last thing for Cassandra, take her back home to die and after they left her, now as Chip, they got back into the Tardis, Rose wondering if he was going to take her home. Emily got her to one side though.

"What was all that about, you snogging the Doctor?"

"What?"

"Don't deny it Rose, I saw the two of ya."

"I was possessed at the time Emm."

"Well it looked like you were enjoying it."

"I was barely aware what was happening, you can't blame me for what she did."

"She said you'd been looking at him."

"Stop it Emily. What would he want with me?"

"So you don't deny it?"

"I'm not having this conversation with you Emm."

The Doctor knew what they were talking about – him. Rose would never had just gone up to him and kissed him, would she? No, he'd never be that lucky.