(Disclaimer: I do not own Doctor Who and the Half-Life series.)

Infinity Squared

By: RoboAngel

Main Characters (aka characters that you'll see most of the time):

Dr. "Ed" Davis: Age: 28. Engineer and robotics expert. Creator of the APE (All-Purpose Exoskeleton) suit and FIDO (Field Integrating Dog-like Operator). Has long dark brown hair that goes past the shoulders, hazel eyes, and is distinguished by her dark red glasses. Wears a black jumpsuit and the dark red Engineer form of the APE suit. Ed is just a nickname used by the team. Her real name is never used and remains a mystery to others except for one man, the Doctor. She is the hero and savior of the world during the White Peak incident by killing the Warden thus destroying any connection between Earth and the Asylum. Unfortunately, after killing the Warden, she and FIDO were taken away to a place that was beyond time, space, and thought by the Chain-Smoking Assistant. She has remained in stasis for the past 18 years while David and the rest of the Infinity team have remained on Earth. Over the past 18 years, tales of her heroic acts and fights against the Asylum at White Peak have earned her a messianic reputation and the name "The Engineer."

David "Goliath" Tennas (after David Tennant): Age: 35. Soldier and hacker. Annie Tennas's little brother. Looks just like David Tennant. In the last story, Ed promised Annie that she would protect David at all costs but by the end of the story when Ed disappeared, David vowed that he would become stronger than he was that day and become Ed's protector. Over the past 18 years, David has trained and grown into a seasoned war veteran and a master hacker. He looks to Ed publically as a hero and secretly as a potential lover for his feelings for her have developed far beyond that of a crush since the last time they were together back at White Peak.

FIDO (Field Integrating Dog-like Operator): A robotic dog that resembles a husky. Created by Dr. "Ed" Davis to look like a dog she once had when she was little and to assist her during engineering jobs. He disappeared with her after the Warden's death and has remained in stasis for the past 18 years. He is equipped with sensors, APE functions, and standard engineering devices.

The Doctor: Age: Unknown. A mysterious alien entity that lives inside a fog watch that Ed carries with her and communicates with her via telepathy. He is the only one who knows Ed's real name, Emma. Very little is known about him other than the fact that he helps Ed with information, he can absorb the life-force of his enemies just by Ed opening up the fog watch and letting his life essence flow onto his enemies, and he is a threat to the Asylum much like Ed. His real identity is a mystery to Ed for she has only seen his 'shadow'. He is also the owner and pilot of a ship called the TARDIS.

Chapter 1: A Girl and Her Dog

"Wake up kiddo," said the Chain-Smoking Assistant. Ed opened her eyes and saw the Chain-Smoking Assistant lighting a cigarette and standing before her in the dark void. She was carrying FIDO, still turned off, in her arms. Ed looked around to see if the Doctor was with her, but he was gone. "Sorry, it's kind of hard for a shadow to stay here but don't worry he's still watching over you, if you get my meaning," said the smoking man with a grin and a wink.

"The fog watch," thought Ed and felt the watch inside her jumpsuit.

"I'll assure you that you haven't been sleeping on the job," said the Chain-Smoking Assistant, "No one is more deserving of a rest than you kiddo." The smoking man then took a long drag from his cigarette and breathed out the smoke. "I'm here because it's time to get to work," said the smoking man and then his appearance changed to make him look like a negative from a photo and then it changed back to normal.

"What the…?" thought Ed.

"A doctor in the wrong place and at the wrong time can make a lot of difference in the world," said the Chain-Smoking Assistant and his image once again changed from negative to normal. "So wake up kiddo and smell the blood," said the smoking man and then disappeared.

Ed and FIDO were left in the darkness again for a few moments when all of a sudden they were surrounded by a blinding blue light. Ed closed her eyes and once the intensity was gone she opened them again. Ed looked around and saw that she was sitting in a subway train going through a tunnel.

"Good morning ma'am," said FIDO and looked at his master as if nothing had happened.

"FIDO my boy, how are you? Do you remember anything at all?" asked Ed as FIDO jumped from her lap and onto the floor.

FIDO shook his head and said, "All that I can remember was that we defeated the mammoth creature and then got hit by a bolt of blue lightning."

Ed sighed and checked herself to see if she had everything, which she didn't. Her APE suit was gone, her hair was down which meant that her hair band was gone, and she had no weapons to defend herself. "So much for keeping the APE suit," muttered Ed.

"Just be glad the Chain-Smoking Assistant didn't make you walk out naked," said the Doctor in her head.

Ed reached inside her black jumpsuit and took out the fog watch that was around her neck. It was good to hear the Doctor again, just the sound of his voice made her calm. "You have a point," said Ed and put the watch back into her suit.

She got up from her seat and walked down the train car. There was only one other person in the car, an old man in a blue jumpsuit with a battered suitcase on his lap. "Hey there," said Ed and sat next to the man while FIDO sat next to her feet.

The old man gave her a depressing look and said, "Funny, I never saw you get on board."

"Let's just say that I'm good at popping up from thin air," said Ed jokingly.

"Well, I suggest that you 'pop' out of here girl," said the old man, "This subway train is taking us to Alpha City."

"Alpha City?" asked Ed.

"You've never heard of Alpha City? Have you been living under a rock?" asked the old man with a puzzled expression.

"I've been a bit of a hermit," said Ed.

"Have you considered joining Hermits United? Great club, we meet every five years," said the Doctor inside Ed's head, "I'm just kidding of course."

"A beautiful young woman such as yourself who can pop out of thin air and is a hermit," said the old man and laughed. "I haven't laughed like this in ages!" said the man with a smile on his face and gave Ed his hand, "Isaac Mason, ex-citizen of England and civilian of the Asylum."

Ed shook his hand and said, "Ed, citizen of the United States."

"Not anymore love," said Isaac, "This country hasn't been called the United States for years. It's called Sector One now and Alpha City is the capital."

"You mean Washington D.C?" asked Ed.

Isaac shook his head. "Alpha City was once called New York City, but that was until the Asylum came and nearly leveled the whole damn planet," said Isaac grimly, "They built a city over the ruins of New York City and called it Alpha City."

"What?!" said Ed, shocked at this revelation.

Isaac nodded his head. "Alpha is a dangerous place if you have hope. Fortunately, I've lost all my hope ever since my family was killed by Civilian Control," said Isaac and then looked at Ed right in the eye, "But it seems that you still have a lot of hope in you, and courage too. I suggest you give up already Ed; no one can stop the Asylum. I think these tales of the Engineer are nothing but a bunch of resistance fighters making up a messiah."

"Who's the Engineer?" asked Ed but before Isaac could say anything, the train stopped and the doors slid open.

"End of the line," said Isaac as he took Ed's hand and gave it a squeeze, "It's been a pleasure talking to a fine lady like you."

"Nice meeting you too," said Ed and forced a smile on her face. What happened to Earth? How long had she and FIDO been away? Who was the Asylum? Who was the Engineer? So many questions were already running through her mind and she hadn't been off the train yet.

Isaac got up from his seat and Ed followed behind him with FIDO behind her. "You better take my advice Ed," said Isaac, "I'd hate to see that pretty face of yours get smashed and shot up by Civilian Control."

"What's Civilian Control?" asked Ed as she exited out of the train with Isaac and FIDO.

"You're being watched by them right now," said Isaac.

Ed looked around her surroundings. The station that they stopped at looked like any other subway station but there were screens everywhere that said:

WELCOME TO ALPHA CITY, THE WARDEN'S BASE OF OPERATIONS

WARNING: NO WARNING SHOTS

Just seeing that sign made Ed's heart sink. "Ma'am where are we?" asked FIDO as they walked up the stairs to the surface.

"I think we're in old New York City," said Ed, still not believing in the fact that the world she knew was gone and replaced with something worse.

"Civilian, stop talking!" ordered a soldier whose voice was scrambled by his mask and was at the top of the subway stairs. The soldier was wearing black body armor and had a metal mask that resembled a goblin's head. The soldier was armed with a rifle and he looked like he wasn't afraid to use it. Once they reached the top of the stairs, the soldier stopped Ed and said, "Civilian you are in violation of the Asylum dress code, the Forbidden Technology Act, and the Old World Silence Policy."

"What?!" demanded Ed.

"You said New York City which is an Old World term, you have a robot which is forbidden, and your jumpsuit is black when it should be blue like the others," informed the soldier.

"Since when did soldiers become the fashion police?" said Ed and Isaac gave a bit of a chuckle.

The soldier then raised his rifle to Ed's face and said, "Civilian you have been found guilty of four violations."

"Four! I thought you said three violations," said Ed while looking down at the barrel of the rifle.

"You have violated the Asylum dress code, the Forbidden Technology Act, the Old World Silence Policy, and assaulted a Civilian Controller," said the CC soldier.

"Just because I made a joke?" said Ed.

"Exactly and for your crimes you will be executed on the spot," said the CC soldier and put his finger on the trigger. Ed closed her eyes and braced for the bullet, but it didn't come. Ed opened her eyes and found Isaac standing over the unconscious soldier with his suitcase split open and its contents spilled out.

"Isaac," said Ed quietly.

"I told you I'd hate to see that pretty face of yours get smashed and shot up by Civilian Control," said Isaac and smirked.

"Riot! Riot!" said another CC soldier who was running towards them.

"Get your dog and get out of here Ed," said Isaac, "Follow the Rings of Infinity!"

"What about you?" asked Ed.

"Don't worry about me, I've got nothing to lose," said Isaac as he ran towards the other CC soldier.

While Isaac distracted the soldier, Ed and FIDO ran off to the nearest alley and kept running. When they thought they lost their CC pursuers, they stopped in a dark and narrow alley way. Ed leaned against a brick wall to catch her breath. "What are we going to do?" she asked herself, "I don't even know where we are."

"I can't get a map of the area via satellite, ma'am," said FIDO, "I'm guessing the Asylum is blocking the signals."

"Perfect, just perfect!" said Ed and pushed off the wall.

"Didn't Isaac Mason say to follow the Rings of Infinity?" said FIDO.

"Yeah but I don't even know what that is," said Ed.

"Could that be it ma'am?" asked FIDO and pointed to another brick wall that was at the end of the alley.

Ed walked to the wall and found the infinity symbol and an arrow pointing to the left spray-painted red on the wall. "This could be it FIDO," said Ed and looked at her canine companion with a grin on her face, "Good job boy!"

"You're very welcome ma'am," said FIDO happily and wagged his metallic tail.

"Let's just hope we'll find some help at the end of this," said Ed and followed the route painted out by the Rings of Infinity with FIDO running close behind her.

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As Ed and FIDO proceeded to follow the route, a young woman in a blue jumpsuit spotted them from her third-story window. She quickly got inside and went to a man who was sitting at a desk with a radio transmitter on it. "John, I found them, the Engineer and FIDO! They're here but they appear to be a bit lost. They're following the Rings of Infinity route right now," said the woman.

"Oh my God, the day has finally come!" said John and turned on the transmitter, "I have to contact Goliath about this. He's been looking for them for years."

The woman looked out of the window again to check and see where Ed and FIDO went. They were at the end of another alley and figuring out another Rings of Infinity sign. The woman could barely hear their conversation.

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"The arrow looks like it's pointing up ma'am" said FIDO.

"Who painted this sign, Spiderman?!" exclaimed Ed. She took a better look at the arrow and said, "No wait, it looks like it's pointing right."

"Do you think this person was lost when he painted this ma'am?" asked FIDO.

"I think he lost his mind," muttered Ed to herself, "but we have no choice, we have to follow the signs or we're screwed." And with that, Ed and FIDO ran to the right.

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The young woman in the blue jumpsuit went back inside and said with tears in her eyes, "It's really them. Thank God!"

John finished sending the message to Goliath and began another message but this time it was for the entire resistance. "I am now transmitting this message to all Watchtower and base frequencies, Dr. Ed Davis and her dog FIDO have returned," announced John, "I repeat Ed Davis and FIDO have returned. The Asylum's Angel of Death has come!"