Imogen gasped, sitting bolt upright. The dream she had was strange…giant crabs…a motor way jam packed with hover cars... she couldn't make head or tail of it. But the one thing she knew for certain, Martha was going to be in trouble.

Imogen scrambled out of bed, almost falling over as she was still feeling not quite herself. She shook her head, trying to pull herself together. She had to find the Doctor and Martha! Imogen dashed out of the door, along the corridors and into the console room. She quickly crossed the grilled floor and down the ramp to the doors. Imogen grabbed the door handle, yanked it open and stepped out into the street.

As soon as she was out of the TARDIS, she took off running.

Imogen had been very eager to find the Doctor and Martha that she accidently collided with someone who was coming around the corner. "Sorry", she said apologetically getting up and helping up the other person as well. It was only then that she recognised who it was. The cat nurse Novice Hame. "Novice Hame?" Imogen didn't mean to stare at the feline but she looked a lot older than the last time she met her. How long had it been?

"Hello Imogen", Novice Hame greeted "You haven't aged at all", she remarked "Time has been less kind to me".

"Oh, I don't know. You look fine to me", Imogen said tactfully. They may not have had the best relationship in terms of the cat nurse and her co-workers breeding humans for experimentation but her mother had always taught her to be polite.

"You're far too kind", Novice Hame said "Listen Imogen, I need you to come with me".

"I'm afraid I can't go with you. My friend is in big trouble. I need to find her", Imogen said.

"Your friend isn't the only one in trouble. There are millions in danger and they need your help", Novice Hame told her.

"If there's that many people in danger then we'll need to find the Doctor", Imogen said "I'm good but I'm not exactly him".

"I'm afraid there's no time for that", Novice Hame said and grabbed hold of her wrist. She pressed a button and they vanished in a flash of light.

~Senate~

Imogen groaned as she landed hard on the floor when they reappeared. "Man that's a rough teleport", she said picking herself up. She wasn't feeling too great from being poisoned by the Carrionites and that landing did not help her any. "Where have you taken me?" she asked Novice Hame. She couldn't easily see in the room due to the lack of light.

"The Senate", Novice Hame said. She pressed a button on her teleport bracelet and light flooded the room. It was a vast area with rows of seats, littered with skeletons. Imogen stared at them, a bad feeling in the pit of her stomach.

"What happened here?" she asked.

"People created chemicals to induce different moods. They're delivered into the body via a patch placed on the neck", Novice Hame explained. Imogen walked over to the nearest skeleton and crouched down, near the neck was a circular sticker. She picked it up carefully. There is a single word stamped on it: Bliss. "that was the latest chemical", Novice Hame said crouching next to her "Everyone tried it. They couldn't stop. A virus mutated inside the compound and became airborne. Everything perished. Even the virus, in the end. It killed the world in seven minutes flat. There was just enough time to close down the walkways and the flyovers, sealing off the under-city", the cat nurse explained "there's millions of people stuck on the motorway because of this".

"And you need my help to get them out?" Imogen asked.

"Yes", Novice Hame replied "but I'm afraid there's not enough power to do so. We did all we could to stop the system from choking".

"Who's 'we'?" Imogen asked "How did you survive?"

"He protected me", Novice Hame said with a smile "he has waited for you and the Doctor, these long years".

"Imogen", a very familiar low voice said somewhere behind them.

"I know that voice", Imogen said she turned and hurried over to the other end of the room where Face of Boe was. She knelt down in front of his tank, placing a hand on the glass "hello again", she said.

"I knew you would come", Boe said.

"Back in the old days, I was made his nurse as penance for my sin", Novice Hame explained.

"What happened to you?" Imogen asked softly to Boe.

"Failing"

"He protected me from the virus by shrouding me in his smoke", Novice Hame informed the brunette "But with no one to maintain it, the City's power died. The under-city would have fallen into the sea".

"So he saved them", Imogen said.

"The Face of Boe wired himself into the mainframe. He's giving his life force just to keep things running", Novice Hame said looking at Boe sadly.

Imogen glanced up at her "surely you could've called for help from the neighbouring planets?" she asked. That's what she would've done if it was her.

Novice Hame shook her head "The last act of the Senate was to declare New Earth unsafe. The automatic quarantine lasts for 100 years", she said.

"And how long ago did all that happen?" Imogen asked nodding over to the skeletons.

"24 years ago", Novice Hame replied.

"So there's 76 years of quarantine left", Imogen stated standing up "there's got to be a way of getting around it".

"I'm afraid there isn't any way Imogen", Novice Hame said.

"Boe doesn't have 76 years left in him", Imogen stated "so we're gonna find a way".

"If anyone can find a way, its you", Boe said.

"Thanks for the vote of confidence", Imogen said. She walked a little ways away and started to pace, racking her brains for something…anything that could be useful. She'd even take a 'feeling' right now. Her eyes shifted over to a computer screen on a wall. Was it her or did it just flicker then? Imogen stared at it from where she stood and sure enough there was another flicker. She dashed over to it and saw what appeared to be a basic plan of the motor way. Near the very bottom was 4-6-5-diamond-6. It seemed to be moving up and down as if it was trying to avoid something.

"Martha is in there", Naiyah spoke up making Imogen jump. She spun around to see the ginger standing behind her.

"Can you help me save her and everyone else on the motor way?" Imogen asked.

The Time Lady smiled "of course I can", she replied. She then proceeded to tell Imogen what to do. Once she finished explaining, Naiyah stood back and watched proudly as she brunette got to work, taking it all in her stride.

Imogen finally flipped a long switch on the floor. Her smile fell when the lights on the console went out. "No!" she cried "this can't be happening!" she ran a hand through her hair "Naiyah what did I do wrong?" she asked looking at the console. There was no answer from the Time Lady. "Naiyah?" she asked turning around but the Time Lady was no longer there. "Well that's just great", she grumbled.

"Who's Naiyah?" Novice Hame asked.

"My imaginary friend", Imogen answered turning back to the console. what the heck was she supposed to do now? The person who could help had just vanished!

"Imogen…" Boe started.

"Not now", Imogen said waving him off.

"I give you my last…" Boe let out a long, rasping breath and everything switches back on again.

"Thanks for that Boe", Imogen said giving the large face a smile. She turned to the cat nurse "Hame, look after him!" she glanced back at Boe "Don't you dare die on me. You've got to see this" Imogen flung the large switch again as Novice Hame hurriedly turned a wheel next to Boe "the open road. Ha!"

~City gent's car~

A large grin spread on the Doctor's face when he suddenly saw sunlight starting to stream down into the motorway. His grin grew wider when Imogen popped up onto the small screen at the front of the car. He should've known she'd had something to do with it. His clever, impossible girl. "Sorry, no Sally Calypso, she was just a hologram. My name is Imogen Smith…"

~Brannigan's car~

"The Doctor said she was clever", Valerie remarked.

"He certainly did", Brannigan agreed.

"And this is an order. Everyone drive up. Right now", Imogen continued.

"Is she serious?" Brannigan asked.

"I've opened the roof of the motorway", Imogen said "Come on. Throttle those engines. Drive up. All of you. The whole under-city. Drive up, drive up, drive up! Fast!"

~City gent's car~

"You heard her", the Doctor said to the smartly dressed man "let's go".

"Don't have to tell me twice", the man said and started moving his vehicle.

~Brannigan's car~

"Here we go", Brannigan said and started to drive upwards along with everyone else.

"We've got to clear that fast lane", Imogen stated "Drive up and get out of the way".

~Milo's car~

Martha never thought she'd be so happy to see the violet eyed girl in all her life the moment she appeared on the screen. "Oi! Car 4-6-5-diamond-6. Martha! Drive up!" Imogen said directly addressing them.

"That's Imogen!" Martha cheered.

"We can't go up! We'll hit the layer!" Milo exclaimed.

"Just do as she says!" Martha urged him "Go up!"

"You've got access above", Imogen added "Now go!"

Milo nodded and steers the car up and out of the reach of the Macra. "It's daylight!" Cheen breathed as they got closer to the top "Oh my God, that's the sky. The real sky!"

Martha laughed in delight at seeing the sky, hugging Cheen.

~Brannigan's car~

"The Doctor said you were clever Imogen", Brannigan remarked into his comm "and it seemed he was absolutely right".

~Senate~

Imogen blushed at that, smiling as she heard his cheers. "You keep driving" she urged him "there's a whole city up here waiting for you and your family, Brannigan. Though if you could do me a favour and pop by the senate, I believe you have something of the Doctor's".

"I reckon that's a fair bar gain, mam", Brannigan said.

Imogen danced over to the window with the microphone beaming at all the cars that were emerging from the motorway. "Doctor…whichever car you're in, come straight to the Senate", she instructed. While she'd been opening the large doors to the motorway, she'd gotten a feeling that the Time Lord was down there too "there's a kiss up here with your name on it".

"I'm on my way", the Doctor responded.

"And car 4-6-5-diamond-6, I've sent you a flight path", Imogen said, directly addressing the car Martha was in "Come to the Senate".

"On my way", Martha replied.

"Imogen!" Novice Hame shouted. Imogen spun around, her face falling seeing cracks starting to appear on the glass of Boe's tank.

The Doctor and Martha rush into the Senate Room, both happy to be reunited with the other. They were also very happy that they were about to be reunited with the clever girl that saved millions of people trapped on the motorway. However, upon seeing the skeletons, their happiness dissipated.

"Gen?" the Doctor called.

"Over here", Imogen called back, not looking away from Boe who was now out of his tank. The Doctor and Martha hurry over, the Time Lord looking very sombre as he saw his old friend, dying.

"What's that?" Martha asked eyeing Boe warily.

"It's the Face of Boe", Imogen said looking up at her "It's all right. Come and say hello", she urged "And this is Hame", the brunette added nodding to Novice Hame. The Doctor was rather surprised to see her given how the left things the last time. "It was Boe who saved you two, not me", Imogen informed the pair.

"My lord gave his life to save the city, and now he's dying", Novice Hame said sadly.

The Doctor shook his head "No, don't say that. Not old Boe. Plenty of life left", he said joining Imogen on the floor.

"It's good to breathe the air once more", Boe said slowly.

"Who is he?" Martha asked kneeling down next to them.

Imogen shrugged "I don't know. Only met him twice before", she replied.

"Even I don't know who he is", the Doctor put in "But legend says the Face of Boe has lived for billions of years. Isn't that right? And you're not about to give up now".

"Everything has its time", Boe stated to the Doctor "You know that, old friend, better than most".

"The legend says more", Novice Hame began.

"Don't. There's no need for that", the Doctor said. He didn't want to hear the supposed 'secret' Boe had for him. Not yet. The cat nurse had said once before that Boe would tell him at the moment of his death. And the Doctor wasn't ready for Boe to die.

"It says that the Face of Boe will speak his final secret to a traveller", Novice Hame continued.

"Yeah, but not yet. Who needs secrets, eh?" the Doctor said trying to keep it together. Imogen took his hand and gave it a squeeze, seeing how upset he was becoming.

"I have seen so much", Boe said "Perhaps too much. I am the last of my kind…just like you".

"That's why we have to survive. Both of us. Don't go", the Doctor pleaded.

"I must", Boe said, his words barely a whisper now "Imogen…never forget who you are. And Doctor…know this…you are not alone". Boe breathed out and closed his eyes for the last time.

~Pharmacy Town~

A little while later the trio walked back through Pharmacy Town. The Doctor was very pleased to see that it was deserted. The vendors had done exactly as he'd told them to. "All closed down", he said.

"Happy?" Martha asked.

"Happy happy", the Doctor replied "New New York can start again. And they've got Novice Hame. Just what every city needs. Cats in charge! Come on, time we were off". He took Imogen's hand and started to walk away with her when Martha stopped.

"But what did he mean, the Face of Boe" she asked "You're not alone".

"I don't know", the Doctor replied.

"You've got Imogen and I. Is that what he meant?" Martha questioned.

"I don't think so. Sorry", the Doctor replied though he wasn't sure when it came to Imogen. She did have that connection to the Time Lady Naiyah. But in all honesty he didn't want to dwell on it right now. He just wanted to get back the to the TARDIS.

"Then what?" Martha asked.

"Doesn't matter. Back to the Tardis, off we go", the Doctor said evading her question. Martha isn't happy with him avoiding her questions. She picked up a fallen chair and sat down.

"All right, are you staying?" the Doctor asked when he and Imogen heard the scrape of the chair and turned around.

"Till you talk to me properly, yes", Martha said "He said last of your kind. What does that mean?"

"Martha the Doctor doesn't want to talk about it", Imogen said.

"It really doesn't matter", the Doctor added.

"You don't talk. You never say. Why not?" Martha demanded.

Fast falls the eventide.

"It's the city", Imogen said hearing the start of a song in the air.

The darkness deepens

"They're singing", Martha added.

Lord, with me abide.

When other helpers fail

"I lied to you, because I liked it. I could pretend. Just for a bit, I could imagine they were still alive, underneath a burnt orange sky. I'm not just a Time Lord. I'm the last of the Time Lords. The Face of Boe was wrong. There's no one else", the Doctor said. Though there was another of his people around in a way but that was through a connection the Time Lady had to Imogen. Imogen, as far as he could tell was human.

"What happened?" Martha asked. Imogen squeezed the Doctor's hand, letting him know that he had her support.

Swift to its close ebbs out life's little day

The Doctor righted two chairs and sat down on one. Imogen sat on the other. "There was a war. A Time War. The last Great Time War", the Doctor said "My people fought a race called the Daleks, for the sake of all creation. And they lost. They lost. Everyone lost. They're all gone now. My family, my friends, even that sky. Oh, you should have seen it, that old planet. The second sun would rise in the south, and the mountains would shine. The leaves on the trees were silver, and when they caught the light every morning, it looked like a forest on fire. When the autumn came, the breeze would blow through the branches like a song…"

~TARDIS, later~

"I fancy a cup of tea", Imogen suddenly said to the Doctor. As soon as they'd gotten back to the TARDIS, Martha had gone to bed, having had enough excitement for one day. The Doctor and Imogen retreated to the library and cuddled up on the sofa. "You want one?"

"Sure", the Doctor replied. The pair got up from the sofa and left the library. It was only when they'd gotten fairly close to the kitchen, when the Doctor stopped Imogen. "Actually there's something I want more than a cup of tea", he said.

"And what's that?" Imogen asked.

"Something you said had my name on it", the Doctor replied and pressed his lips against hers.