I didn't know if Rose would be jealous, but she's amazing. She understands completely, how me and Donna need each other, but aren't in love at all – just best mates. I think the way we tease each other all the time, and how Donna calls me stick insect was enough to show Rose that she is the only one for me, and that there's no attraction between Donna and I, just strong friendship.
But I can't help thinking, there's still another Donna out there – my Donna – who is missing the doctor so much, without realising it. A Donna who is so sad, but can't remember why.
Spending so much time with the Doctor, it was inevitable that at some point, Donna would end up face to face with an alien. There came the day when she walked into the Doctor and Rose's house to find the Doctor grappling with a huge, livid creature with bright orange scales and five legs, and was secreting a pulsing slime over the carpet.
Rose ran in and smothered it in a double bed sheet, giving the Doctor enough time to programme the alien's home planet co-ordinates into a transmat device, and it vanished.
The two of them stood there panting, and Donna just stood there and stared at them.
After a good thirty seconds, she gained enough composure to demand, "What the HELL was that?"
The Doctor and Rose exchanged guilty glances like a pair of children caught being naughty by an angry school teacher.
"I'll clean up the mess," Rose volunteered, leaving the Doctor with the harder job of dealing with Donna.
Donna folded her arms, and glared at the Doctor.
"Well?" she said.
"That was a Quinteptil, from the planet Makka, in the Pinwheel Galaxy," he explained, for want of anything else to say.
"An alien." said Donna.
The Doctor nodded.
"An ALIEN from SPACE?"
The Doctor nodded.
"An alien from space in LONDON?"
The Doctor nodded.
"And all you can do is NOD? Stop nodding!"
Looking even more like a naughty school boy, the Doctor stopped nodding.
Donna sat down heavily in an armchair.
"Aliens," she repeated, rubbing her temples.
"So, you believe me?" the Doctor asked, sitting down too.
Donna considered. "A few years ago, I would have said no straight away, but after the stars started disappearing, and before that all those robot things converting people..." her voice caught.
"Who was it?" he asked. "Who did you know who died?"
"My Dad. Geoffrey Noble. One day he went to work and never came back. Mum cried for a month, I think." And she turned away from him so he wouldn't see her tears.
Her tears pierced the Doctor's heart, and having only one didn't make it any less painful.
"I'm so sorry," he told her, for more things than her father's death.
She sniffed.
"Yeah, well," she said, "it wasn't your fault, was it?"
Only it was. Not her father's death, but the rest of it. Only, he was talking to the wrong Donna.
"What about if I told you there were parallel dimensions? Do you believe in other worlds?"
"I dunno," she admitted, after some thought. "Why on earth are you asking me th –"
"Would you believe me if I said we had met, in another universe?"
Dumfounded silence.
"Those robots, the Cybermen, after a while they all just suddenly disappeared, didn't they? They went to my universe."
Donna just stared at him.
"Donna Noble, temp from Chiswick, astronomer Grandfather, terrifying mother, lover of hats, equipped for every occasion, ginger, impossible in the mornings before you've had any caffeine, supporter of West Ham United, you hate your middle name, Eileen, after your grandmother, and when you were five, you fell off a ladder and broke your arm. Only you refused to tell me why you were up a ladder..."
Her mouth opened slightly.
"We were best friends."
Donna just looked at him.
"Whoa. Have I just made Donna speechless?"
"OK. You know what, I think you're bonkers, I don't have a clue what you mean by parallel universes, and you're starting to sound like a stalker, but for some reason, I believe you. Your face, I just can't not trust it."
Yay some aliens at last - I had to get some in here :D
please reviewwwwwwwww!