A/N: Promise I haven't forgotten about this fic ;) (Also, shout out to mir96 for noticing my 9-chapter pattern and to Jaden Xiang for noticing Debbie. Little things, but gosh do they make me happy!)

Disclaimer: I don't own the rights to Supernatural or Doctor Who.

...

The Doctor pounded his fists against the outer shell of the Void Ship, even though he knew there was no use. It couldn't be opened from the outside. He already knew that.

He whirled around, fury snarling in his lips. "Bring. Him. Back," he snapped at the Dalek, pointing first at the ship and then at the Dalek, bending over so they were nose-to-eyestalk so that the Dalek inside could see just how angry he was.

He'd always imagined that the Daleks were terrified of him, and it might help to put the fear of the Doctor into them.

But the Dalek just swiveled its eyestalk at him for a moment, then said, "No. He is in-sur-ance."

The Doctor snarled again. "What do you want?"

The Dalek seemed to wobble a bit, then turned its sights on Vanessa.

Vanessa took a deep breath and turned to the Doctor. "As far as I can understand," she said, glancing nervously at the Dalek, "this … thing … keeps …" She waved her hand, trying to come up with the words. "It keeps blinking in and out of existence."

A slow, malicious grin spread over the Doctor's face. "And you'd like me to help with that?" the Doctor asked, licking his lips. "I'm sure I could keep you permanently out of existence, if you'd like."

He was glad Martha wasn't around to stop him. He didn't really want to be stopped.

The Dalek seemed to consider him for a moment before, suddenly, it moved towards the wall. Some kind of panel opened up, and the Dalek interfaced with it even as the Doctor leaped forward. He had a feeling he didn't want to know what the Dalek was up to.

But he wasn't fast enough, and as the Doctor turned to regain his balance, he saw the flickering in the corner of his gaze where the Void Ship was.

"No!" he shouted, bounding forward again, this time in the direction he had just been standing.

But he was too late. The ship had disappeared.

The Doctor spun on his heels, fury burning beneath his gaze. He saw in one glance the cruelty of the Daleks, remembered the fires on his home planet, and instead of forgetting, he let those memories fuel him as his every step burned the ground. "That," he spat out, "was a mistake."

"You can re-trieve him," the Dalek said simply.

The Doctor flung his hand back to indicate the space behind him. "With what?" he half-shouted. "That Void Ship wasn't ready for time or space travel, let alone a trip through the Void."

The possibilities filled his mind. Disintegration upon entering the Void. Successfully entering the Void but without hull integrity. Or worse, Dean could just be sitting there in the Void, in the nothingness, slowly losing his mind.

"He hasn't gone into the Void," Vanessa said suddenly.

It was the way she said it that made him pause, the way she sounded so certain, yes, but also so sad. The Doctor turned to her, switching gears in an instant to assess her situation. "How do you know?"

Vanessa's hands clenched into fists, but the Doctor saw her gaze flick toward the Dalek before she looked down again. "I know."

The Doctor took a deep breath, pressing his fingers to the bridge of his nose. "Alright," he burst out. "Okay, fine, yes, suppose I help you," he said, spinning around to point his finger at the Dalek. "I can't trust you to guarantee you'll bring him back—them back." He added that last part with a glance over his shoulder at Vanessa.

"You will re-trieve him," the Dalek said again.

The Doctor felt his hands shaking, and he shoved them into his coat pockets, covering for the movement by leaning casually against the wall. A slow smile spread across his face as the understanding dawned on him, and he almost snorted out loud.

"Oh, I see," he said, straightening up. "That temporal jump of yours is faulty, isn't it?"

The Dalek held his gaze.

He leaned forward, smiling, knowing that he could press his advantage because he was useful. "Tell me, Caan, when do you think your next accidental trip into the abyss of the Time Vortex will be?"

He could have sworn the Dalek was shaking.

"I'd say," the Doctor continued in an even tone, "you don't have much time left." He glanced over to see that the sparks of the time fissure, once invisible to all but Time Lord eyes, were now gleaming red hot so that even Vanessa could likely spot them.

…..

Martha was worried about Sam.

She didn't think it was possible for a Winchester to crack under the pressure, but there he was, running ahead of her, glancing back desperately at something she couldn't see.

"Sam, what's going on?" Martha demanded. "I thought we were trying to keep a low profile!"

"No time for that right now!" Sam shouted back at her, flinging open the nearest door and practically throwing himself and Martha inside. The door slammed shut behind them, and Martha was surprised to hear something heavy thud against it.

She threw her weight into the door, now that she knew that they were fighting something that close, and did her best to keep it from crashing down on them both even as Sam fumbled for something in the bag slung over his shoulder.

"Ha!" he cried out in triumph as he produced the salt and got to work salting the doorway.

The thudding against the door seemed to pause, but Sam kept right on working, going for windows as well as doors as he went, frowning and breathing heavily.

"Sam?" Martha asked.

Sam didn't answer. He was too busy methodically salting everything.

"Sam?" she tried again. "Sam, what are those things?"

It was as if Sam had only just noticed that she was there. He looked up with a start, and when he tried to plaster a smile onto his face, he could only manage something like a grimace. "Hell hounds," he said.

"You're kidding me."

"Not kidding," Sam said. His frown deepened. "I'm not sure what they're doing here." He shook his head. "I mean, I have an idea, but…" He sighed and motioned for Martha to follow him. "C'mon. We know Dean and the Doctor went this way. If we can catch up with Dean…." He trailed off again, this time with a more urgent look on his face.

"Watch out!" he shouted as he grabbed Martha and dove to the floor. She heard the glass shatter behind her and was hardly conscious of getting to her feet before she was running.

They reached a door, which Martha flung open, and they both threw themselves hard into the door to slam it closed even as the hell hound—which was apparently invisible—threw all its weight into the door to try and take it down.

Sam was already salting the door when Martha turned to see where they had managed to find themselves—only to gasp when she saw, just a few feet away from her, a Dalek.

She scrambled to her feet and was about to get Sam's attention when the door shattered behind her, and Sam was thrown sideways. He shouted in surprise and then in pain, and Martha was alarmed to see blood pooling across his chest.