Aliens in Cardiff
The Doctor was constantly looking behind his back, each time with a more worried facial expression. Donna was quick to pick it up and asked what's wrong.
"Nothing, just... don't you get that feeling too? Ever since Martha left, Time feels different" he said.
"«Time feels different"? Oh my god Doctor, admit you were involved with that girl. What, are you looking behind your back in case her mother comes and tries to slap you?" Donna went on uncontrollable laughter but she stopped when she noticed the Doctor hadn't spoken for a whole minute.
She looked at his face again. The worried expression was replaced with one of shock and disbelief. She followed the line of his sight and noticed a silver person standing in front of the Wales Millennium Centre. Donna was not a fool. She realised that was no ordinary person even if she couldn't recognise the species.
The Doctor poked her softly and said without taking his eyes of the silver nemesis.
"Donna, when I say run, run... RUN" and so they started running towards the TARDIS. It should have been close. A minute's run, tops.
"It's gone, Doctor! The TARDIS is gone!" shouted Donna. The Doctor was busy trying to find the correct setting on his sonic screwdriver and didn't pay attention.
"It's okay Donna, get into the TARDIS, they can't break in with their technology... now, what number's that again... it has been a while since I last needed it" he said.
Donna took refuge to violence to grab the Timelord's attention.
"Focus on this, alien boy: you know, your blue box right? Bigger on the inside? Yeah, GONE! The TARDIS is gone" she said complete with her typical gestures.
"Hwat? Hwat? What do you mean it's gone? She can't be gone! I like her. I need her..." the Doctor seemed to mentally drift away and lose touch with his surroundings.
"Don't you just stay standing 'ere! That thing is getting close!" she said and immediately she noticed that the silver enemy was loading it's alien-looking gun.
Donna realized it's up to her to save them. She removed the sonic screwdriver from the Doctor, she forced him to lie on the ground so he's not a target and she tried every setting on the sonic.
"Okay, that thing looks metal so it must be around the 200s rang—" some sort of ray coming out of the man's gun scathed her right arm, but barely. A burn mark appeared. That was it. Donna decisively pointed the screwdriver towards the thing that attacked them and BOOM. "Take that, Tin Woodman!" yelled the Donna Victorious as the body parts of the attacker went flying sky-high.
The head landed next to the Doctor. It was robot-like. Rectangular, some sort of pipe connecting the two sides, face only vaguely humanoid. Donna noticed that behind the metal casing something organic could be seem. That wasn't a robot, she thought and immediately decided to un-think it. She turned to the Doctor who was till in the position she placed him. He looked empty. She talked to him but he remained silent. He was staring directly into nothingness.
Suddenly a band of these organic robots appeared out of thin air and they were marching towards them. Donna couldn't figure out from were did they appear but she readied the sonic. Before she could fight though, a black SUV coming from the left stopped between Donna and the silver army.