Disclaimer: I, of course, don't own Doctor Who. If I did, I wouldn't be doing this. The only thing I own is Luna and her friends and family. I also own the plot. Please read and review

I'm sorry to say that this is the final chapter.

A/N If you have enjoyed this story, I have plenty more stories featuring The 10th Doctor and Luna Edwards. One I suggest everyone reads is one called Luna's Prophecy. Personally, I think it is better than this one and is my favourite.

The doctor's moon

Chapter 17

Out of the smoke, Luna finally emerged with a ray gun in her hands, aimed at Pierce. She was solid and looked emotionless compared to her normal self. It had the Doctor worried. She had one thing on her mind and was determined. Mr Edwards saw he was cornered and started backing up with his hands in the air.

"My precious Luna," He grinned, "I don't think you're thinking straight. I'm your father. I may have left when you were younger but I still made you."

"That doesn't give you the right to play God with other people," Luna replied, coldly, "Do you realise that you are putting the entire planet at risk by doing this?"

"Foolish girl. Of course I do. But I have perfect control of it. Don't you want to know more about what your Doctor is all about?"

"I'd rather he told me with his voice."

The Doctor watched in amazement as his assistant showed great strength and composure. She took a couple of steps closer so that Pierce couldn't get to the Doctor.

"Guards! Stop her!"

A quite evil looking smile spread across Luna's face. She seemed to know where the guards were. She explained that they were easily disposed of and that they weren't coming to her father's aid anytime soon.

As the Doctor starred at Luna's cold composure, he could help think about where she'd started from when he first met her. She wasn't the wide eyed and adventurous girl anymore. She was now a knowledgeable defender of Earth. Her blue eyes had lost their warmth and gone cold. Suddenly, Pierce started laughing loudly. Luna's solid expression fell a bit as she tried to figure out why he was laughing.

"You wouldn't really pull that trigger," He grinned, "If you have spent time being round the Doctor then you should be completely against killing if it can be avoided. Obviously, you are not doing your job as a Time Lord, Doctor, keeping peace amongst planets."

Suddenly, his body went stiff and he fell on to the floor. Luna put the ray gun back in its holster then got out the sonic screwdriver. She used it to free the Doctor. He got off and looked at his companion. She was staring at her father on the floor.

"He isn't dead, is he?" The Doctor asked.

"No, I just stunned him," She explained, "The gun has two settings, kill and stun. There's no point killing him."

"Where did you get that ray gun?"

"The monster you saved me from when I first met you. You forgot to take it off me and disable it."

The Doctor was quite glad he did forget. Now there was the question of what to do with Pierce. There was only one solution that the Doctor could think of. He explained it to Luna and she agreed it would be best.

They loaded him in to the TARDIS and secured him. The Doctor set the coordinates while Luna got changed. Their plan was quite a dark one but it would teach Pierce a lesson. As they scurried around the ship, he started to come round. He opened his eyes and saw the Doctor and Luna stood over him.

"What's going on?" He panicked.

"You want to learn about the Time Lords," Luna said, "So we are taking you to learn about the most important fact about Galifrey."

"Only it's just Luna taking you," The Doctor added, "I'm staying on Earth."

"Why?"

They didn't answer him. The Doctor turned to Luna and told her to be careful. She smiled and assured him she knew what to do.

"You'd better come back because I want my TARDIS back." The Doctor teased.

"I will."

The Doctor put on his coat over his pinstripe suit then left. Luna then took off the brake and the TARDIS set off home.

Soon, Luna scrambled about getting the box to stop in space. It hadn't landed, just hovered in space. Luna then led her handcuffed father to the doors and opened them. Before them was a beautiful planet at least three miles away. Luna wanted to be amazed but she knew what was about to happen. Pierce however stared at it in awe.

"Is this Galifrey?" He asked.

"Yes," Luna replied, "The home of the Time Lords. The Doctor's home."

"It's so beautiful and just awesome."

Suddenly the planet turned dark and looked as though it was on fire. It was burning before their eyes. There were faint screams from the surface that made Luna hold back sobs. It was horrific to see and just as bad to hear.

"It's burning." Pierce gasped in shock.

"That's why the Doctor didn't come with us. It still hurts."

"He really is the last isn't he?"

Luna just nodded. Her father was finally seeing how catastrophic it would have been if she hadn't saved the Doctor. Luna knew what happened to the planet but it hurt to watch this. She could appreciate how lonely the Doctor felt.

"I can't believe that I almost killed the last of an entire species," Pierce said quietly, "I can't watch anymore."

That was good enough for Luna. She shut the doors and flew the TARDIS back to Earth. She felt that glass of wine and a hug were needed.

On Earth, Tom and Victoria listen as the Doctor explained what happened and where Luna was now. The house had now been tided up and looked good as new. That's when the door opened and Luna walked in looking depressed. She looked at the Doctor who saw what was wrong. He stood up and hugged her tight. Then Pierce, still cuffed walked in. The group froze with anxiety.

"Doctor," He said, "I saw what happened to your home and I'm so sorry for almost killing you. I didn't realise the situation."

"I'm glad you understand now." The Doctor replied.

"On the way home with Luna, I decided to go back to teaching at a University I was teaching at before I lost it. Also I'd like the chance to get to know you better, Luna."

This seemed like a good plan. However, Pierce couldn't just get back in to the Edwards' life just like that so once the Doctor had realised him, he went back to his own home and promised to visit often.

An hour later, the Doctor was in the TARDIS chilling out when Luna walked in looking sombre. He jumped up ready to go but spotted the look on her face. He read the look and knew what was coming.

"I guess this is it," She said, "Time to say goodbye."

"It doesn't have to be." the Doctor replied.

"Doctor, you said the three words you're not allowed to say and to save any heartache between us, its time to part."

The Doctor turned his gaze to his cream shoes and sighed as he knew she was right. Then he remembered a promise he made to her.

"Well, I tell you what; let's spend the rest of the day together. Just you and me on Earth not chasing aliens."

That brought a smile to Luna's face. She wasn't expecting that but happily agreed to it.

It was a nice change from the usually madness that Luna had got used to since being with the Doctor. She showed some of her favourite places to visit. The natural history museum was the first place. Luna loved the look of amazement on the Doctor's face. He did look a tad out of place dressed in his blue suit but Luna didn't care. She had never spent so long in the museum before. The Doctor was reading everything and even going to more depth about interesting subjects. After the museum, Luna took him to get an ice cream. As the Time Lord was quite new to the concept, he just had a plan vanilla while Luna had strawberry.

"This is what I love about you humans," He said, "You can make things like ice in to food. Brilliant!"

Luna just laughed.

That night, Luna couldn't believe it when she found herself lying next to her favourite Time Lord on her bed. This was the last time she would be able to appreciate his company probably forever.

"I'm going to miss you, Doctor." She whispered.

He just gave a small smile and stared in her eyes. Downstairs, Victoria hoped that Luna wasn't making things hard on herself. She knew that Luna was deeply in love with Doctor but wondered if she was just getting in to deep trouble. Back upstairs, the Doctor gave up fighting what he wanted to do and lightly kissed Luna on the lips. Once it was over, Luna was a little breathless as she stared at him. Then their lips met again but this time the kiss was more tender and passionate. Again, Luna didn't see any of this coming but loved it anyway.

A few hours later, in the middle of the night, the Doctor woke to find Luna sleeping soundly. He got up, threw on his suit and shoes then his coat. She was still asleep and looked very sweet.

"Good bye, Luna."

With that the Doctor left the house. He got in the TARDIS and set it ready to leave. He took his time taking the brake off. Meanwhile, Luna started waking up when she heard the beautiful sound of the TARDIS departing. She suddenly realised what it meant and ran to the window. She was just in time to see the blue box disappear. She felt her heart ache even though she knew it was going to happen. She felt tears slip down her face but didn't stop them falling.

When day broke, Luna found her mother and best friends downstairs having breakfast. Victoria didn't have to ask what was matter or where the Doctor was.

"Oh, Luna," She said hugging her daughter, "I'm sorry sweetheart."

"He just got up and left?" Alice snapped, "After everything you've been through with him."

She and Tom looked at Luna who looked back with a look that said she was expecting it. She then explained that it was best as neither of them would be hurt too much. That's when she noticed there was something around her ankle. She looked and saw the Galifrey anklet that the Doctor gave her. He must have decided to leave it for her as a way of remembering their adventures. She smiled slightly and took it upstairs to put it in its own draw of her jewellery box. She just hoped she'd see the TARDIS and the Doctor again.

I hope you have enjoyed this story like I have writing it. For those who want to see more of Luna, then I am thinking of doing a sequeal but that will only happen if you tell me you want it. Anyway, thanks to everyone who has read, reviewed or even just looked at this story, I appreciate it all.