A/N: Hey guys! I really wanted to do this crossover as I had this idea ages ago but never got it down! Anyways, I hope you like it and as always, please read and review!
Chapter 1
Merlin stood there, looking at his brother with pleading eyes, but the Doctor was having none of it. "So, you want me to go and save Arthur from getting stabbed by Mordred? Seriously, the things I do for you" said the Doctor. Merlin smiled a little smile. "Thank you Doctor!" he said. He walked out of the TARDIS and didn't look back. He really did owe his brother, big time! But he wouldn't be able to repay him as that was the last time he was ever going to see the doctor. He kept walking until he reached Camlan. Once at Camlan, merlin walked over to the tent that held all the armour and weapons. He didn't expect to find Gwen in there. "What are you doing in here?" asked Gwen. Merlin didn't answer. He grabbed some spare armour and a sword. "No time for questions Gwen, help me into this armour. Now!" was all merlin said? Gwen helped him into his armour and handed him a sword. "Merlin, do you even know how to use a sword?" she asked, still confused as to why merlin needed one. "Yes, but Arthur can't find out that I've been here. Tell him I'm sorry" said Merlin as he left the tent.
Arthur looked at the boy. He was still so young and had his whole life ahead of him, but he chose Morgana over Camelot. "Mordred, think about what you're doing!" he said in a calm tone. "What, like you did when you killed Kara? You don't understand what it's like to live in fear your whole life Arthur! Now, I will make sure you pay for what you have done!" Mordred shouted. Arthur closed his eyes as he waited for the sword to strike him, but it never came. A whizzing sound was coming from behind him. He knew exactly what that sound was. It was the TARDIS.
When he opened his eyes, he was in a room, a big room. He spun round and saw a man with dark brown hair, a brown blazer, black trousers and small boots standing there. The man spun round when he felt Arthur's eyes on him. "Arthur?" said the doctor. "Doctor what's going on?" asked Arthur just a tad confused. The man smiled. "I' don't know but I'm going to find out." he said as he pulled a leaver. The whole room started shaking as it moved. Arthur was holding onto the railings for dear life. The doctor went round to where a brown box was hanging. It looked like a little television screen. His eyes went wide as he looked at it. "NO!" he said. "What's wrong?" asked Arthur as he finally let go of the railing to see what was wrong. On the screen was a picture of merlin and a date underneath it. "That's merlin" Arthur whispered to himself. "Why have you bought this up and what does it mean?" he asked the doctor. "It means a fixed point in time has been created. Merlin has to die at Camlan or Camelot will fall!" said the doctor. He was furious. Merlin was his baby brother and he was going to die.
"Can't you just change time? You said so yourself, you have a TARDIS you can change any part of time that you want" said Arthur. "Not a fixed point I can't. If I do, time won't just stop, it will disintegrate! Merlin has to die or the whole universe will burn" came the reply. Saying that Arthur was shocked would be an understatement. He couldn't just stand there and do nothing. He couldn't let his best friend die. "You told me ages ago that your people, you can change! You can regenerate. If Merlin is your brother, can he do the same?" asked Arthur. The doctor looked at him. "That doesn't matter! If Merlin doesn't die, then we are all doomed!" said The Doctor. Then an idea struck him. "I have an idea" He looked at him oddly. The Doctor just laughed. He was going to use the tesilector to help his brother to cheat death!
A/N: Hey guy! I know its short but oh well. So what do you think? Like it? Hate it? please let me know!