Totally spontaneous fiction I thought up. I ADORE Donna Noble, my favoritest companion in everrs, (Yes I know spelling/grammar police) and so I had to come up with a way to bring her back. The idea is sort of alluded to, but basically it's this:

Donna starts to overheat w/ the Time Lord-ness inside of her.
The Doctor uses his Chameleon arch to save her, but leaves her memories intact.

Additionally, I figured the Doctor and Donna are totally epic as friends, but I'd throw them a curveball and invent something (which makes no sense, I know) to change their relationship status to 'It's Complicated.'

I own nothing.

Once again, I know the basis for plot makes no sense. So what, it's Doctor Who-It can be completely preposterous and yet so unbelievably believable.

"Doctor-"

"Not now, Donna. Just wait until you see the burning rivers of Lavi Three. They say as the waters reach the very edge of the cliff, they glow red and orange, and you can see each flaming speck of water soar off from the rocks and shine at every angle-what's wrong with you?"

"Nothing," Donna replied quickly, shrugging. Nothing could have been further from the truth, but the Doctor saw her deceitful smile and didn't need any further convincing.

"Right. Off to Lavi Three!"

Donna closed her eyes, turning away silently. She couldn't, wouldn't tell the Doctor what was happening. It was too…weird. Even for them, it was impossible-it wasn't right, her guess was wrong. It didn't make sense. Still…she was late.

She had never, never been late before.

But it couldn't be that, because she hadn't-that-for a while. Certainly not while traveling with the Doctor. She had only one idea, but it was totally preposterous.

When she had begun to react poorly to taking in the Doctor's mind, he took something called a Chameleon arch and put it on her head-it hurt, but he told her without it, he faced two unthinkable options: watching her die in front of him, or watching her leave, her memory lost forever. She told him afterwards she'd rather die than leave him; he replied he'd rather die than see her go. He added that he guessed, as she was human to begin with, the time lord DNA that was torn from her left a genetic trace within her-what it was he had not clue. What if it was…a child?

She obediently followed him from the TARDIS as it landed, but as they walked towards the banister, beyond which the burning rivers flowed, she frowned uncomfortably. If what she feared was happening, was-not that she was saying it was, because it was mad-what would happen? She had seen how he had reacted to Jenny, a literal clone of himself; while he came to accept her, could he accept a child with so little Time Lord DNA as his own child…? No, that was not happening. It was totally, unbelievably preposterous. She wasn't having any alien babies.

"Look, Donna-the foam bursts into flames-"

"Yes, I can see, thank you," She replied tartly, instantly regretting it. The Doctor looked sharply at her.

"Are you sure you're okay, Donna?" he asked, and she knew he wouldn't accept a shrugged-off answer; his eyes were narrowed alertly. She sighed.

"I don't know," she admitted. She wouldn't give a specific answer, however- "I think it might be something from that Chameleon thing."

The Doctor instantly became concerned. "Do you feel alright? Do you need to lie down or something? There's an infirmary here."

Donna nodded quickly. "Maybe I should, yeah," she said thoughtfully. The Doctor nodded-apparently he knew the layout of the site by heart, because he began leading her down a stone path.

"Any other symptoms? Feeling queasy, have a headache-"

"I think-I'm feeling dizzy," Donna answered, as the world began to spin. They found a building labeled 'Infirmary' and entered, and a nurse led them to a back room.

"The doctor will be in shortly to help you," she said after the Doctor explained how Donna was feeling and she took something called a z-ray. Donna couldn't speak, her hand pressed into her forehead and her mouth curled into a scowl.

The Doctor paced back and forth, and when Donna shot him an exasperated look he proceeded into bouncing on his heels.

"Waiting rooms-always enough to make me antsy," he said uncomfortably. "Wonder if there's a little shop-all hospitals need a little shop."

The door opened again and a dark-skinned man with an amiable smile entered. "Hello, Mr. and Mrs.…"

"We're not a couple," they instinctively insisted. The man raised his eyebrows, but shrugged. "Who am I to judge, eh? Well, Mr.-"

"Doctor, actually."

"And I'm Donna."

The man nodded. "Doctor, I am happy to say that they're all perfectly fine."

Donna's heart froze solid as the Doctor furrowed his brow. "All…?"

"Donna and the children, of course," he said. Donna could practically see the Doctor's hearts skip a beat as he exhaled suddenly. "She's carrying twins."