"Luke, try to patch my watch into Clyde's mobile, if we can utilize the power build up we might be able to boost the signal enough to contact Mr. Smith." Sarah Jane called as she hurried through the corridors without bothering to wait for the three kids behind her. "We need to get outside, see how we're trapped here. We obviously have artificial gravity, what else do we have?"

They walked in on two of the interns arguing by the window. One of them was the girl who had checked Sarah Jane's heartbeat, and mistakenly given a symptom instead of a diagnosis.

"…we'll lose all the air!" one of the girls cried.

"But the windows aren't air tight," said the other one. "The air should have all been sucked out right away, but it wasn't."

"Good logic." Sarah Jane said. Both girls jumped. "What's your name, again?"

"Martha," said the black girl, "Martha Jones, and you're Mrs. Smith, right?"

"It's Miss," Sarah Jane said, not looking at the girl, instead checking the windows, "I'm not married, and it's Sarah Jane. Come on, we need to get to the patients' lounge. Show us where it is, please."

"This way." Martha said, starting to lead the way, but the other girl grabbed her arm.

"Martha, don't go," pleaded the girl, "you might die."

"I might not." replied Martha, "Look, you look after the patients, I'll be back."

Martha led the group through the corridors. Sarah Jane kept up with the young intern, Luke walking next to her, trying to patch the battery in Clyde's phone to his mum's watch. "I need the lipstick." he said. Sarah Jane handed it over.

"What's that?" asked Martha.

"Sonic lipstick." Sarah Jane answered.

Martha looked peeved, "Well, if you're not going to answer me properly…"

"No, it really is." Luke said, "See, it's a sonic probe concealed as a lipstick tube." He showed it to Martha.

Martha brought them to the patients' lounge. Sarah Jane opened the doors to the balcony.

"Woah..." Clyde breathed. "We're really, properly in space."

"And we have air." Maria added, "Sarah Jane, how can we have air?"

Sarah Jane didn't answer right away. She looked around and found a pebble on the ground. She threw it as hard as she could outwards. It hit something causing waves of barely visible movement, like a ripple in water.

"Force field?" Luke asked.

"Keeping the air in." said Sarah Jane.

"But, that means we only have the air we came here with." Martha said, "What happens when it runs out?"

Sarah Jane didn't answer right away. "We need to get home before we find out." she said finally. "Luke, how is that phone going?"

"I think I'll be able to patch it through." Luke answered.

There was a loud sound that Sarah Jane recognized as rockets landing. "What's that?" Maria asked. She leaned over the side of the railing to see the ships landing. "Do you recognize them?" she asked.

"No," replied Sarah Jane, "But for some reason that makes me more anxious."

"I got it!" Luke exclaimed. "We can talk to Mr. Smith now." He handed the mobile to Sarah Jane, who took it without hesitation. She dialed Mr. Smith.

"I thought you said you weren't married." Martha asked.

It picked up immediately. "Hello, Sarah Jane, I am detecting a call coming from somewhere in the earth's orbit."

"We're on the moon." Sarah Jane answered. "Can you teleport us down?" There was a moment of quiet on the phone, as Mr. Smith calculated.

"I'm sorry, Sarah Jane, but an unknown entity is interfering with my signal. Teleport not possible."

Sarah Jane didn't reply. She looked at Luke, Maria, and Clyde. She stranded them here. "Okay, then…" She thought for a second, not sure what her next move would be. "There are aliens here. If I describe them, can you tell me what we're dealing with?"

"I will try." Mr. Smith promised.

"What's going on?" asked Martha, "Are you aliens?"

"Not exactly." Maria answered.

"Clyde, does this take pictures?" Sarah Jane asked, indicating the phone.

"Yeah," Clyde said.

"Good. Clyde, you come with me. Maria, Luke, take Martha and find out what is making those energy spikes and stop it." Sarah Jane instructed.

The kids nodded. Martha looked confused, but Sarah Jane trusted her son to explain things to her. Before they turned away, Sarah Jane took Luke by the arms. "Be careful," she said, "And I love you."

"I love you, too." Luke answered, "I'll see you soon." She kissed his forehead.

Sarah Jane signaled for Clyde to follow her and made her way to the lobby. "Mr. Smith, are you still there?"

"Yes, Sarah Jane." answered Mr. Smith.

"Okay," She crouched by a fake plant so she could see the goings-on below. The plastic leaves filled her with hope for a second then snatched it away. All the plants in the hospital were fake, hypo-allergenic. If they'd been real, they might have been slightly better equipped to maintain the oxygen. They might have a bit of a chance. It was a big hospital, after all, plenty of room for oxygen to hide, but there were also a lot of people in it.

After a second Sarah Jane saw the creatures appear. They were massive humanoids dressed in black leather armor, wearing huge helmets.

"They don't look friendly." Clyde said.

The aliens took off their helmets. Sarah Jane could barely believe it. On the human form were huge rhino heads. The leader took out a device and held it to a terrified intern.

"What the bloody hell are those?" Clyde asked.

Sarah Jane lifted the phone and snapped a picture of the creatures then put the phone back up to her ear. "Can you give me any information on them?" She asked her computer.

"What you are encountering is a race called the Judoon. They are a bounty hunter race employed by the galactic police to enforce the law. Sarah Jane, it is vital you do what they say, or they will execute."

"So they were the ones who brought us to the moon?" Clyde asked.

"Basic H2O scoop to isolate the hospital." Mr. Smith replied. "Something else must be using the hospital for a hideout. Beware, if the Judoon find the hospital guilty of harboring a fugitive, they could punish everyone in it."

Sarah Jane took a breath, trying to keep herself from panicking. "Thank you, Mr. Smith." She hung up.

"So what are they looking for?" Clyde asked.

"I have no idea." answered Sarah Jane.

"So basically," Martha said, after Luke and Maria's brief explanation of their work, "You're alien hunters."

"We don't just hunt aliens." Maria objected, "We help them, too. Not all of them are evil like the Daleks and the Cybermen. Some of them are nice. Like there was this one creature from a planet call Crysinania, she showed us books from her home planet, they had pictures of skies painted with diamonds, and…"

"Maria," Luke cut across, "If you don't mind, we can chat about the good and pretty later."

Maria made a face at him.

Martha entered a room, "Doctor…." But a woman looked up a bloody straw in her mouth. Luke's stomach churned as he saw the dead man on the floor. "Sorry." Martha said, her face pale.

"Kill them." The woman ordered. A leather clad man turned to the group.

"Run!" Luke yelled. Martha led the kids through to an x-ray lab. Luke and Maria barricaded the door.

"What was that?" Maria demanded, breathing heavy.

"A vampire." Martha suggested.

"I don't think so." said Luke, "Mr. Smith was telling me about species that need blood to maintain physical shape, or some that mimic the DNA of their victims to hide."

There was a bang at the door, the barricade started breaking. Maria screamed.

"So how do we stop her?" Martha asked.

"I don't know." Luke answered. There was another bang at the door.

"Luke, we need to move." Maria said, panicked. Luke ignored her.

"We need to get to the source of the energy spike." Luke said. "Then warn Mum about the bloodsucker."

"First we need to get out of here!" Maria said.

Martha looked around as the door creaked. "Ventilation shafts." she said, pointing to a grate on the ceiling.

"Brilliant." Luke said. He ran over to it and took the grate off it. He was welcomed with a face full of dust. It was small, but they would fit. "Maria, you first." he said.

Maria took a breath, she looked worried. Luke cupped his hands and boosted her up. He could hear her cough as she got in there. "It's a bit dusty." she yelled.

Martha helped Luke up then she followed just as there was a loud bang, the leather man broke down the door. "Go forward." Luke hissed.

Maria obeyed. They got to the end of the shaft where there was another grate. "It won't open," she said, "give me the sonic."

"I don't have the sonic." Luke told her, "I gave it back to Mum."

"Crap." she murmured. There were loud, reverberating bangs, and Luke could hear people outside screaming, as Maria hit the grate. "Ouch!" she cried, but she hit it again and again. Finally it fell off the vent.

"Maria?" a familiar voice said.

"Hey, Sarah Jane." answered Maria, "Can you help me down?" Maria was pulled from the shaft.

Luke could now see the room they were in. It was a filing room, desks and computers scattered around. Clyde was helping Maria straighten up on the floor. Sarah Jane reached up to help Luke out. "Thanks," Luke said.

Clyde helped Martha out.

"Maria," Sarah Jane said, "Your hand." Luke looked over. Maria's hand was gashed from where she hit the grating. It was already bleeding heavily.

"It's fine." Maria lied, trying to hide her cut. She looked very pale. Luke knew that Maria hated blood, particularly her own. Not many things got to Maria, but blood did.

"No, it's not." said Sarah Jane.

Martha dusted her coat off. "Come on, Maria." Martha said, "I'll get that stitched up for you."

As Martha had Maria sit down at a computer chair, Luke turned to his mother. "There's another creature in the hospital, she looks like an old woman." he told her, "But I think it's some sort of blood imitator."

"Of course!" murmured Sarah Jane. "Of course the Plasmacores. It must be a plasmavore they're after. The creatures who trapped us here, they're Judoon. They're like police, only for universal affairs. They're seeking out a fugitive that's hiding in the hospital."

"Great, let's nab the old biddy and we can go home." Clyde said.

"I'm afraid 'nabbing the old biddy' might be harder than you think, Clyde." Sarah Jane said. "If she is a plasmavore, she won't register as an alien."

"What if…" Luke started. "What if I could cancel out the human blood in her system?" Luke suggested. "Martha, do you have stuff to do blood typing here?"

Martha looked up from doing her stitches. "Yeah, in the lab."

"Okay." Sarah Jane said. "We'll start there." As soon as Maria's hand was stitched up, Martha lead them to the lab. But by the time the group got to the lab, Sarah Jane was worried about how much time they had to figure this out. People were half-collapsed in the hallway, and Maria was already wheezing from exercise and blood loss.

"Luke, you need to figure this out quickly." Sarah Jane warned.

"But he's just a kid." said Martha.

"A very clever kid." Sarah Jane told her.

He did. It took him five minutes, then he held up a syringe. "If I'm right, this should cancel out the properties of human blood. I just hope it works."

"It's going to have to." Sarah Jane said. Taking the syringe. But by the time it took to figure out the mix Maria was on her knee looking very pale and very sleepy. "Maria!" Sarah Jane shouted, running over to the girl. "Maria, darling, don't go to sleep." Maria looked up sleepily, her eyes barely regarding Sarah Jane at all.

"I'm…okay." She murmured.

"Here." Martha said. She budged between Sarah Jane and Maria. She held an oxygen mask up to Maria's face. "Just breathe, Maria. It's okay." Then she looked up at Sarah Jane. "We don't have much time; we'll be out of air soon. There aren't enough oxygen tanks for all these people."

"Right." Sarah Jane said, fear for Maria in her stomach, the young girl looked ready to pass out. There was no way she would be able to move, but Sarah Jane didn't want to leave her on her own. "Clyde, you stay here and take care of Maria." Clyde opened his mouth to protest but Sarah Jane cut him off. "Please, Clyde, I need you to protect her."

Clyde nodded. Sarah Jane kissed him on the forehead. Then she kissed Maria's forehead. "I'll be back for you as soon as I can." She promised them, "Stay safe."

The lack of oxygen was starting to drag Sarah Jane down as the static electricity was building as well. "If we find the source of the electric surge…" said Sarah Jane, "we should find the plasmavore."

"What uses the most energy in the hospital?" Luke asked Martha.

"I don't know." said Martha, "the MRI, I guess, or the radiation machines, or the..."

"Which is closer?" interrupted Luke.

"MRI." Martha replied.

"Then let's check there first." Sarah Jane said. Again, Martha led the way. Sarah Jane couldn't help but admire her courage and acceptance of the impossible. When they got out of this, Sarah Jane might have found another ally. Luke seemed to like her as well, as did Maria. She certainly knew how to keep her head in a stressful situation.

They got to the MRI room to see another young intern struggling with two leather-clad beings.

"Mum, it's her!" Luke yelled, pointing behind the leather men at an old woman in a dressing gown.

"Martha..." gasped the intern being held, "Help."

Luke charged at one of the leather men, hitting him with full force. The man was unbalanced and fell from the intern, Luke slammed to the floor next to him. "Luke!" Sarah Jane cried. In a split second the leather man recovered from the blow and pinned Luke down. Martha whacked it over the head with an oxygen tank. Luke rolled to his side and got up.

"Oliver, get out of here!" Martha yelled, as she jammed the oxygen tank in the face of the second leather man. She handed the oxygen tank to Oliver. "Get to safety."

"But, but, that thing…" He said, pointing to the MRI which was going crazy, electric currents visibly coming off it.

"I can stop it." Sarah Jane promised.

Oliver nodded and ran. Luke and Martha continued to wrestle the leather men. Martha looked behind her back. "Stand back!" Martha yelled. Luke hit the floor and covered his head. Martha grabbed the men's arms and forced them into the electrically charged MRI. Sarah Jane shielded her eyes. The leather men hit the floor dead, but so did Martha.

"NO!" Luke yelled. He tried to run to her, but Sarah Jane grabbed him around the torso and pulled him from harm.

"There's nothing we can do." Sarah Jane said, her heart full of sadness. Martha was barely more than a kid, she didn't need to die. She rounded on the old woman, anger flaring. "What are you?" Sarah Jane demanded, "Why are you doing this?"

"Just stopped for a little snack," the woman said innocently, "Then the Judoon tracked me down, and this is the perfect opportunity. I can use this MRI to burn everything within a 250,000 miles radius."

"But that includes the earth!" Luke yelled. He was panting heavily from the tussle with the leather men.

"Only the side facing the moon." she said nonchalantly, "The other side will be fine. Call it a gift."

"Why are you doing this?" Sarah Jane demanded, her hand shaky on Luke's shoulder.

"I'll be safe behind this shield here, while the Judoon get roasted." The Plasmavore explained. "Then I can fly away in their ships."

"You'd destroy a planet just to get home?" Sarah Jane said in disbelief. "There are billions of people down there, thousands in here. A thousand people will suffocate, my son…" She held Luke close, "he's fourteen years old. There are children here, babies…"

"Not my problem." The Plasmavore hissed.

Sarah Jane's stomach twisted, but her heart hardened. "You think so?" she asked. She broke away from Luke, and ran at the plasmavore. She sunk the syringe into her skin and depressed it. The Plasmavore screamed and fell to the floor.

"Mum," Luke said, "This is critical." He indicated the MRI.

"I've got it." Sarah Jane told him. She took out the sonic and broke the machine. There was a bang and a small explosion. Then the MRI went dead. As adrenaline died away, Sarah Jane felt her head swirl with the lack of air.

"You did it." Luke said, he smiled, even though he wasn't so much panting now as wheezing, and looked unsteady. But there was barely time to celebrate. Sarah Jane noticed he was sluggish too. He looked at the plasmavore. She was gasping, her face turning an odd shade of purple. Sarah Jane wasn't sure what Luke had used in the syringe, but it was working. He turned back to his Mum, she thought he was going to run over and hug her but before instead he fell to his knees.

"Luke!" Sarah Jane cried, running to her son. "Luke, no." She sank to the floor with him and gathered him in her arms. She felt him shake slightly as he tried to breathe, tried to get nonexistent oxygen out of the hot, heavy air.

"I'm okay." Luke told her. His voice was unsteady.

"I know you are." Sarah Jane whispered, she hugged him close and rocked him. "Hold on, Luke, please, hold on." The Judoon would come in soon and find the plasmavore, they had to, and they the hospital would go home, "Hold on for a little bit and we'll be home soon."

"I'm tired, Mum." murmured Luke.

"You mustn't sleep." Sarah Jane told him. "Listen to me, Luke, stay awake. You mustn't go to sleep."

"Okay," he murmured. But his head was getting heavier on Sarah Jane's chest. She shook him slightly.

"Please, Luke," Sarah Jane cried, "it's never been more important, stay awake. Stay awake."

"I loveyou, Mum." He whispered, barely audible, his words starting to slur together.

"I love you, too." Sarah Jane cried. "So much."

"Iwannagohome." Luke murmured. "Sotired."

Sarah Jane ran her fingers through his messy brown hair, "We'll be home soon, I promise. But until then, keep your eyes open."

"M'kay." She felt him try to lift his head up, but he couldn't. "Thanky…ou" he said heavily, barely bordering on the edge of consciousness, "For…beingmy…mum."

Sarah Jane felt a tear slide down her cheek, she hugged him tighter. He was giving up, he couldn't give up. She wouldn't let him. He was going to live, he had to. She wouldn't lose, not here, not now, not ever.

"Please, Luke, stay with me. Hold on, please. Don't close your eyes. Please, Luke. Luke? Luke! Luke, please, no! Luke!" She shook him but he didn't wake. He had to wake. He couldn't die! Not like this! Not at fourteen! Not on a hospital floor so far from home.

"Luke! Luke, wake up! Please, Luke!" Sarah Jane felt her heart break. This couldn't be real. She shook him again, "Luke! God no! Please! No!"

He didn't stir. He was completely still. Luke. Her Luke. Her wonderful, clever, perfect son - the most important thing in her life, the only thing in her life that mattered - was gone. It was her fault. "Luke." She cried desperately into her son's hair, hugging him tight, as though trying to transfer her life to him. She would if she could. She would die a thousand times if he could live. There's nothing she wouldn't give to make him wake up. She would trade her life for his in a second. But it was useless. He couldn't hear her pleads, "Luke, wake up, please, wake up." But her sobbing didn't last long, as she felt her own life fading from her. She wouldn't be separated from her son for long.

She faintly heard a Judoon's voice saying, "Nonhuman confirmed, execute." But she heard no more after that. Still clutching her son's body for dear life, Sarah Jane Smith drifted to sleep. Leaving the world she tried so hard to protect, protecting it one last time.

The hospital returned to Earth. Alan Jackson stood in a queue of anxious people, along with Tish Jones, Carla Langer, and thousands of others. None of them saw or even noticed each other. All of them were about to receive the worst news they could possibly imagine.

The following Christmas, the Jones family as well as Carla Langer were killed, when a spaceship that looked like the Titanic crashed into London. Alan Jackson, who had moved to Liverpool after he lost his daughter, died a few months later, when a car he was in locked and filled with toxic gas from an ATMOS device that was supposed to stop toxins from getting into the environment. The same day, Jack Harkness, Ianto Jones, and Gwen Cooper were incinerated as they tried to stop a fleet of Sontarns from poisoning the Earth. A few months later, in a town called Danemouth, despite living in Britain almost their entire lives, a couple who never met Sarah Jane or Luke Smith, Haresh and Gita Chandra were sent to a "work camp" with their daughter Rani. Rani and Gita both fell very ill and died within weeks of moving. And in a street in Chiswick, Donna Noble lay on the street dying. And another Donna turned left.