Disclaimer: i do not own Doctor who, only Catharine.

Chapter Ten Betrayal Comes Disguised

The Doctor struggled trying to get himself used to Catharine's presence. It was strange, every day he was expecting her to be human but instead she was truly a Time Lady, it made him angry. How could the Master do something so awful to such a harmless child?

Catharine was sitting next to a computer typing away. Her eyes followed each keystroke and letter that she made. He stood in the doorway waiting to see what would happen. Suddenly she got to her feet, and as if not seeing him, walked out. He quickly looked at the computer screen to realize that she had programmed a computer virus to attack the UNIT mainframe. The Doctor tried to stop the virus but failed. Everything that was a part of UNIT was destroyed. He ran after Catharine to see that she was talking, as if casually, with the Brigadier. "Brigadier Sir Alistair Gordon Lethbridge-Stewart, I am ordering you to arrest Catharine Smith." The Doctor said calmly.

Catharine didn't move nor question why the Doctor was ordering her arrest but the Brigadier was. "What is wrong with you Doctor?"

"You'll find that there is a virus infecting your computer network, she's the one who put it there." The Doctor quickly grabbed hold of both of Catharine's wrists then took the handcuffs from one of the guards that walked by. Catharine put her arms behind her back and let the Doctor put the cuffs on. He walked her into the close holding cell then looked at her sadly. "Catharine, why did you do this?"

"My Master's orders, he commanded me to do this, I must obey him." Her voice was different, almost nonchalantly and monotone. "Doctor, the end is coming, it is predestined."

"Not this time," He said while pushing her to the bed. "I promised James, myself and Ianto that you would come to no harm. And that is how it is going to be."

"Really?" A shrill but all too familiar male voice said. "I find that keeping her under my control is easy and very entertaining." The blonde haired Harold Saxon walked up to the Doctor, behind him were the two body guards carrying the unconscious bodies of Martha Jones and Brigadier Alistair.

"Master, you've come for me." Catharine said standing up and walking over to the door of the cell.

"Yes my child, I have come for you." He beckoned her with a wave of his hand and she came up to him. Holding the silver cylindrical device, known only as the laser screwdriver, he undid her bonds then took hold of her thin dainty hand. "Any last requests have you Doctor before I lock you away for all eternity?"'

"Yeah, tell me why you turned an innocent human into a Time Lord only to do what you order her to do." He said while looking down at Catharine sadly. It made his hearts hurt thinking about what the Master had in mind for her. "We were supposed to be the last; no more…then you go and create this…this…abomination!" He was not meaning to hurt Catharine with his words, only break through the barriers and psychic programming. Catharine merely looked at him with the strangest look; she was looking at him but not. Her gaze pierced the depths of his soul but there was nothing alive behind her eyes.

"I don't understand what the man means Master, what is he saying?" She asked while holding his hand like a child would hold their fathers.

"Ignore him sweetie, he only means to frighten you." He walked away then, looked at the Doctor with a grin. "You will learn in time that I had help changing her…you and her father helped make this a possibility."

When Martha and the Brigadier woke up the Doctor was leaning against the wall with his hands and knees covering his face. Martha was the first to speak up. "Doctor, what's wrong?"

"I caused this; I caused Catharine to betray us." He whispered. "It started with Utopia. Her father was a Time Lord, he's got her father." The Doctor was not making complete sense but then again he was rambling.

"Doctor, what are you saying?" The Brigadier asked while struggling to his feet.

"I think he's blaming himself for what has happened." Martha concluded. Her chocolate brown gaze followed the walking patterns of the guards. "We have to get out of here, if we're to help Catharine regain herself."

"That won't be happening anytime soon." The Doctor whispered.

Martha glared back at him. "So that's it, you're giving up just like that?" She snapped while getting in front of him. "You've saved the Earth so many times and you're just going to stand by and let her be washed away and controlled?"

"Martha," The Doctor whispered.

"Don't speak to me Doctor; you've given up on her, now I've given up on you." Martha walked back to the door of the prison cell. "Brigadier, do you have any idea how to break out of here?"

"Sorry but I don't think there is any way to get out of here." The Brigadier replied then looked at his long time friend. 'Martha's right Doctor' his gaze seemed to say.

The Doctor stared out towards the door. He fingered the sonic screwdriver that had been left in his pocket. That was the first thing that struck him; they had left him with the screwdriver. Catharine would have known that he had it, so would the Master, unless she was still slightly in her right mind. He took a deep calming breath before trying to think of other possibilities. It was conceivable that Catharine was only slightly under the Master's influence but it was also conceivable that she was just insane enough to have forgotten something such as this. He stood up and put the screwdriver in Martha's hands as discreetly as possible. "Oi, guards!" The Doctor shouted through the window. "I would like some water please." The guard nodded his head and walked off. He smirked at Martha then nodded his head. She pointed the screwdriver at the door and it flung open quickly but quietly. They grinned at each other then at the Brigadier.

"Go save her." The Brigadier said while sitting on the ground.

The Doctor and Martha ran off then looked at a fork in the hallway. "I don't know which one has a larger computer room?" The Doctor asked. Martha pointed to the right and they ran off again. This time they walked into the largest computer room to see the Master, his wife, Catharine and the man in the red Victorian coat. "THIS IS MADNESS!" He shouted then pointed the screwdriver towards the main large computer. The computer stopped working and smoke started pouring out of it. The group turned around and the Master glared at him.

"You escaped," The Master said while grabbing hold of the closest guard's gun and pointing it at him. "Maybe I should have killed you, made sure that you didn't live to see the end."

Catharine looked at the Doctor with her all too familiar blank stare. He couldn't see anything behind her gaze. But the man in the Victorian coat grabbed hold of her shoulder and shook her slightly. She didn't seem to register that he was shaking her. He bent down and whispered in her ear and her eyes flashed back to life. But she made her eyes go back to their blank stare when the Master looked back at her. She didn't move until the Master started looking and taunting at the Doctor. Her movement was swift and she ran in front of the gun as the Master began to pull the trigger. Her hands hit the barrel of the gun and pushed it so that it fired up. She then punched him in the larynx then the chest. Catharine then kneed him in the nose when he bent down in pain.

"Don't try messing with my head again…Master." Her voice held high amounts of disdain and anger. "Must I remind people like you, hypnotism does not work on me!" She saw and calculated that he was brining the gun back up to shoot her but this time she wrenched his wrist with her right hand then took the gun away with her left. She pointed it at the Master's head as Lucy Saxon pointed a gun at Catharine.

"Shoot him and you die," Lucy whispered.

The man in the Victorian coat whipped out a gun of his own. "Then it would be the last mistake you ever made." He whispered while stepping out of the shadows. "Catharine, my child, are you all right?"

"Never better father." She said while pulling the Master to his feet and pointing the gun at his head. "Men, release the prisoners and make the cell ready!" She ordered while shoving the Master towards the holding cell.

The Doctor grinned to himself as he walked behind them. He knew that she could no longer bring herself to kill anyone but she almost looked as if she would. "Catharine, talk to me." He whispered while trying to sense what she was feeling. Nothing, her mind was completely blocked from him.

"Give me a few; I have to lock him away." She said sternly while shoving the Master into the holding cell then taking away his laser screwdriver and other belongings besides his clothing. She finally allowed the people that had come with the Master to be put in with him. She looked at the Doctor sadly. They walked away from the cell and she took hold of the sleeve of his suit coat. "Was what you said true?"

"What did I say?"

She looked at him like he was insane. "You called me an abomination." He felt the pain of his own words and then let out a staggered breath.

"I was trying to get you to become yourself again but it failed."

"You needed my real name…that's what my father said to me." She let go of him then nodded her head. "Look I should get going, there are some things I need to fix that I caused." She walked towards the computer room and then sat down. Her eyes took in the scene that was now the once strong firewall of the UNIT mainframe. The Doctor watched her as she typed away the new programming for the mainframe.

"Catharine, what's happened to you?"

She turned around then smiled at him. "Whatever do you mean Doctor; I am a picture of perfect health." Her voice lilted in the air while he walked closer to her. He nodded his head then put a hand on her shoulders.

"You've changed, from that little soldier girl to a well mannered Time Lady." He pulled her into a hug. "And I find it a great honor that you've traveled with me for quite some time."

She nodded her head then rested it against his chest. She could hear the drumming in the back of her mind but she now knew what it meant. It wasn't drums of war like the Master had thought; the drumming was the heart beats of every living Time Lord. The pain that she felt was not a physical one, but an emotional one. She had become tempted to kill the Master, much like she would have back when she was a soldier. "Hearts torn by war," She whispered against his chest.

"Made whole by the sacrifices of a new life," He whispered back.

A/N: Review please.