This is something I put together in a short space of time.
Luke Smith, 29, well that's what his birth certificate said. He was sitting on a bench in a park watching his two kids in the park. They were about 5. They were twins, fraternally speaking; one boy and one girl. They were playing on the swings.
They weren't exactly all human. Among his adventures as a boy he met many evil aliens, but the cosmos did bring them the occasional good guy, odds says that it was bound to happen. They were still half human, and luckily for them they inherited most of his best qualities; brains and reflexes.
He became good friends with aliens that meant no harm to the Earth, in fact one of them became his girlfriend, and eventually his wife. She looked human, her body chemistry was just a little more advanced/different, and her hair was naturally electric blue. They stayed together as they grew up, they never thought that they could have children together, but they never did check, and once she found out she was expecting, that answered their question.
Her name was Luna, well that was the human name she chose, her original name had lost its meaning and was almost unpronounceable to most humans. She was currently on her home world, whilst he had the kids.
As soon as she was able to visit her home planet again, she left, but she always came back, for Luke and the children.
Luke was busy reminiscing before he noticed the familiar looking stranger sitting next to him, who was offering him a banana.
"No thanks. Doctor?" he said his name quietly just in case.
"Long time no see eh" The doctor said putting the banana back in his pocket.
"Well, relatively speaking, yeah"
"I see you've been busy. Half...Castalian. Wow, that's some achievement, not many Castalian's pair up with humans. And twins no less. Who's the lucky lady then?"
"Luna, you'll meet her...eventually"
The Doctor gave him a friendly look that said "you know the rules...".
"What are their names?"
"Lily and Clyde"
"Have they manifested yet?"
"Yes, last year. It was pretty messy, but they've already save the Earth once".
"So they know..."
"Everything. It's hard to hide things when your children can read your mind" Luke said filling in the blanks.
"Erm... you might want to leave before they see you" Luke said as the kids were now playing on the slide which was very close to them.
"Why?"
"Because, they..." Luke paused.
A couple of cheering 5 year olds rushed over to the Doctor.
They ran straight to him and gave him a cuddle.
"Know you" Luke finished.
Lily sat herself on the Doctors lap; so Clyde sat on Luke's lap.
"You helped them through the manifest. But they can always tell when you're around"
Lily looked up into the Doctor's eyes and grinned.
"you two go play for a bit, I tell you when the Doctor is leaving" Luke said to his children in his mind; he knew they were always listening in here.
"Okay Daddy" they both said simultaneously, then jumped off his lap and went back to playing.
The Doctor and Luke continued talking about how everyone was at this point in time, without Luke giving too much away that could change the course in events.
"I thought the Judoon grounded you and Clyde"
"They owed us one, and we convinced them to unground us. This way I can go to Castalia with the kids"
Suddenly Luke was hit with a massive pain in his head.
"Luke!" the Doctor said.
"Daddy, help!"
The Doctor saw the look in Luke's eyes, he knew it all too well, it was the face of a father whose children were in peril.
Luke jumped up and ran to his children's mental cry.
The Doctor jumped up and followed; Luke ran faster and faster towards the rim of the forest.
He slowed to find rocks floating in the air.
He quickly ran over to Clyde.
"What's wrong? Where's your sister?"
"She tripped" Clyde said pointing to her.
He ran over to her and picked her up in his arms, her eyes were wide open but lacked focus. She had a large cut on her forehead which was bleeding heavily. The rocks, twigs and other debris from the floor began to float in a circle. It began to orbit faster and faster. Luke linked his mind to hers. He told her to relax, let go, go to sleep.
Her eyes slowly closed and she went limp in his arms.
The Doctor stood by and watched, he was impressed, not many humans could cope with children with such abilities.
"Come here Clyde" Luke said calmly.
"Hey there's no need to cry. You did good by calling me" Luke said using a hand to wipe his tears.
"You mean it?" Clyde sniffed.
"You know if I lie. You fix your sister for me?"
Clyde nodded and smiled. He put a hand over Lily's cut. As soon as his hand came away there was no sign or blood or any cut. As soon as he was done his eyelids started to close.
He picked up Clyde using his other arm and allowed him to drift asleep.
"Nicely handled" The Doctor said.
"All in a day's work eh. You mind carrying Clyde back home. It's only 5 minutes away"
"Of Course" The Doctor said merrily taking Clyde off Luke.
The Doctor of course knew of these children, by legend alone, he never suspected that Luke would be the father of such children.
Just as promised his house was not far,
The Doctor followed Luke up the stairs and put Clyde down on the Double bed next to Lily.
The Doctor walked back down again followed by Luke.
"You should rest"
"I'm fine"
The Doctor gave him a little poke and Luke fell over on the sofa asleep, bordering on unconscious.
"Sure you are" the Doctor said grinning.
He left a note on Luke; 'look after those children, but don't forget yourself...'
The Doctor left as swiftly as he arrived, unannounced and in silence and straight off into another adventure.
A/N - So what did you think???