(Disclaimer: This is a mix between Doctor Who and the video game series, Half-Life. I do not own Doctor Who and the Half-Life series. I also would like to thank the creators of both Doctor Who and Half-life for inspiring me to create a sequel for this fanfic and for showing the people of the world that scientists and doctors can kick some serious ass. Thank you and please sit back, relax, and enjoy the show.)

Infinity Squared

By: RoboAngel

Prologue: I Wish

18 years later…

In the wintery wilderness of the Appalachian Mountains, a man in winter gear was laying on the snow with his hands behind his head. His face was covered with a scarf, his coat hood, a winter headband, and goggles. He lifted off his goggles, revealing a pair of brown eyes looking up to the starry night sky as snow started to fall again. "I wish I could show you this," he said aloud with his voice muffled by the scarf, "I wish you were right next to me."

Just then a young British woman's voice came on from his earpiece. "Goliath you can come home now, it's the shift change," said the woman in the earpiece.

"Roger that, if you need me I'll be in my room," replied Goliath through the earpiece.

"As always," said the woman and the earpiece went silent.

Goliath laughed a little, got up, and headed back to Green Cave base. It was a 15 minute walk from where he was but he didn't mind, the walking helped him think. When he arrived to the cave base, the soldiers for the next shift were already coming out through the huge metal doors that sealed the cave from the outside world. One of the soldiers for the next shift, a friend of Goliath's, saw him coming to the gate and said with an American accent and a grin , "Hey there Goliath! I just want to say that you were a fricking machine out there last week when you destroyed that Asylum vessel with a single rocket! How do you do it man?!"

"Training and experience," said Goliath with his voice still muffled by his scarf.

"Yeah I've been meaning to ask you Goliath why you train yourself so much," asked his friend, "Did you lose someone when the Asylum arrived?"

"Yes, my sister during the First Wave," said Goliath sadly.

"Oh man, I forgot that you were a Survivor from White Peak," apologized his friend, "So is that why you train and fight so much?"

Goliath shook his head and said, "No, I still fight for my sister's death but the main reason is because I'm doing all of this for a woman."

His friend had a shocked and surprised look on his face and said, "A woman?! You never told me that you had a girlfriend. Wow, and here I thought you were living like a monk or something!"

"This woman is not my girlfriend," said Goliath and chuckled a bit, "but she's very important to me."

Now his friend's expression turned to confusion. "Okay then buddy," said his friend and walked off into the white wilderness for his shift.

Goliath proceeded to walk into the base. "Although I do wish that she was mine," said Goliath to himself. Over the past 18 years, Goliath's feelings for this one woman grew from a teenage crush, to an infatuation, to a full-blown head-over-heels passionate kind of love. Every day he couldn't stop thinking of her, he couldn't stop replaying those last few minutes they had together when she promised him that she would come back, gave him a wink, and proceeded up to the surface with her robot dog before she was taken from him, before he even had the time to tell her how much he cared for her and liked her even though they just met.

Goliath went inside his room and locked the door behind him. He took off his winter gear and sat down next to a desk that had a radio transmitter and two framed pictures: one was of his sister and the other was of a woman and a young man. He took the picture of the couple with one hand and ran his fingers through his thick brown hair as he gazed upon the face of the woman he had fallen in love with and had sworn to protect. She was an American woman from Ohio; she had long dark brown hair that went past her shoulders, beautiful hazel eyes, and dark red framed glasses. He looked at the young man who was standing beside her in the picture; it was his 17 year old self. Back then he was a teenager nicknamed Davy who didn't know what he wanted to do with his life with thick black glasses and couldn't even defend himself. But now, he had grown into a seasoned war veteran called Goliath with improved eye sight. He was ready to become her protector like she was for him so long ago.

Goliath rubbed his eyes and put the picture down, he flipped on the radio transmitter and announced, "This is Lieutenant David 'Goliath' Tennas, I am broadcasting on all Watchtower frequencies to see if anyone has seen a young woman with a robotic dog walking about. I am looking for the Engineer herself, Dr. Ed Davis, and her robotic dog, FIDO. If you do, please contact me immediately. I repeat, this is Lieutenant David 'Goliath' Tennas, I am broadcasting on all Watchtower frequencies to see if anyone has seen a young woman with a robotic dog walking about. I am looking for the Engineer herself, Dr. Ed Davis, and her robotic dog, FIDO. If you do, please contact me immediately." Once Goliath was done, he looped his message and sent it out on all hidden Watchtower frequencies so that the Asylum would never find out who he was and who he was looking for. He had been doing this every day ever since Tom taught him about radio communications, hoping that one day someone would reply back. After he had finished his daily radio ritual, he slumped into his bed and before he gave into sleep he said, "I wish you were here Ed."

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The next morning, Goliath shot up from his bed. He felt something wet on his face and realized that he was crying, he couldn't remember the last time he cried ever since White Peak. He just woke up from a strange dream; he saw Ed and FIDO floating in a dark abyss sleeping and could hear her thoughts. "Someone save us. Someone get us out of here. I want to know what happened to David, Chris, and Tom. I want to know what happened to them. I want to make sure that they're alright," begged Ed in her head. But it was after that when he woke up.

"She's suffering," said Goliath to himself and let more tears flow down his eyes.

Just then, a man's voice blared out of the radio transmitter. "This is Watchtower 7 in Alpha City, we have just spotted the Engineer and FIDO they appear to be lost and confused about their surroundings but they appear to be fine for now," said the man's voice on the radio, "Goliath, if you're hearing this please come to Alpha City and take the Engineer and her dog to someplace safe before Civilian Control takes them."

Goliath immediately got up from his bed, put on a leather jacket and goggles, and took Ed's old shotgun and hammer with him. He ran down the hall and towards the lab where Chris was. He had to teleport to Alpha City and save Ed before it was too late. "Hang on Ed, I'm coming for you," he said under his breath and continued to run towards the lab.

Meanwhile, back in Goliath's room, the man from Watchtower 7 announced, "I am now transmitting this message to all Watchtower and base frequencies, Dr. Ed Davis and her dog FIDO have returned. I repeat Ed Davis and FIDO have returned. The Asylum's Angel of Death has come!"