A/N: Ok.. I have no idea where this came from but here's the final chapter.

Katherine was having so much fun with the Doctor. She saw the stars, she could almost touch them and yet there was something that she couldn't let go… Klaus.

Why couldn't she forget about him? She didn't have to fear him anymore, but she was worried about Damon and Stefan, she knew he was still threatening them. She hated to admit that she cared, maybe too much.

It was just a matter of time before the Doctor asked, "where do you want to go?" and she saw an opportunity. She could make him suffer, she could change the past. She knew that the Doctor would never let her do it, but she had a plan.

"I… I would like to see my daughter… can you take me to her?"

"Katherine… I don't know, it's dangerous…"

"Please, Doctor" He knew how she felt, losing someone and then have an opportunity to see them again, he couldn't refuse.

"Ok, but you have to promise that you won't tell her who you are or change anything on her life while we are there"

"I promise" Katherine hugged him, she closed her eyes for a moment. It was time.

The TARDIS appeared in the street. Katherine and the Doctor walked towards a house, it was a nice place, looked like her daughter was adopted by a good family.

Katherine almost felt the urge to run away. No, she had to do this...

A little girl was playing on the backyard, she must have been 8 years old. She looked so much like her, Katherine approached her. The Doctor waited and watched Katherine as she got closer to her daughter.

Her heart was beating faster, she had her eyes.

"Hi" she waved at the girl.

The girl looked at the woman, "I shouldn't talk to strangers" she said with the sweetest voice and Katherine felt a hole in her chest.

"It's ok, I… just want to know… are you happy?"

The girl looked at her and frowned, "yes" she answered.

She was happy. That's all she needed to know.

Katherine's face changed, the little girl screamed.

The Doctor ran towards Katherine.

"What are you doing! Katherine" he took her arm, she had transformed.

"Get out of my way"

"Im sorry Katherine I can't let you do this" he had figured out what she wanted to do, all this time she played with him when everything she wanted was revenge. Katherine was right about something, she wasn't the girl he knew. He had to accept that she was a vampire and she would never have her human emotions restored completely. He knew that… and this time he was prepared.

Katherine felt her skin burning, the Doctor held her as she lost her balance. "Vervain…" Katherine glanced at him and then fainted. He had injected her with Vervain.

He made sure Katherine's daughter was ok before leaving.

The TARDIS arrived on earth, year 2012.

Katherine was almost completely recovered, she hadn't spoken with the Doctor since the incident but she knew that he was taking her back.

At first he felt angry at her and then he felt sorry. She would never be Katerina again and he couldn't help her not after what she did.

She let the emotions in and out. Almost losing herself in the process, she was confused, angry, sad. She was broken.

"Goodbye Katherine" the Doctor watched her walk outside the TARDIS.

She turned around, she felt empty inside. She knew he could never forgive her betrayal, she knew she had lost him forever.

Katherine approached the Doctor and kissed him in the cheek.

"Goodbye" she whispered to him and then walked away.

She was feeling numb, it was just when she heard the TARDIS leaving that it hit her. Her hands covered her mouth as she cried.

The Doctor stood in front of the door, the kiss she gave him made him realize how he felt about her. He almost came back for her but he resisted. However, there was something he could do for her, one last thing.

Katherine spent days without leaving the room of the hotel. She had spoken with Damon and she knew that Klaus was still busy trying to find the coffins. She decided she could herself a break and just stay in a place for a while.

Someone knocked at the door.

There was no one outside, she looked in the hall confused then she glanced at the floor. There was a box with a note on it.

"I think you will find this useful – The Doctor" she almost let the note fall when she read the signature.

She took the box and opened it.

He had found a weapon that could kill Klaus. Another little note inside said "This is called the Colt, kills any supernatural being – be careful!"

Katherine took the gun in her hands.

"Thank you Doctor"

A/N: Little wink at a possible Supernatural crossover in there LOL. I just... I don't know, I feel like I lost track of where I wanted to go with this final chapter. I've just been so busy with life that I can barely think straight. Anyway, hope you liked it. And hopefully more people will start writing Katherine/Eleven *winks*