This story was prompted by a challenge on Heliopolis to make a Stargate / Doctor Who crossover. It's set in an alternate universe; a sort of blending of the two shows. It's set somewhere around the beginning of Season 2 of SG-1 and Season 14 of Dr Who. I suppose I should warn you about spoilers, but if you haven't seen Doctor Who: Pyramids of Mars let this be a lesson to you.

Enough of this – on with the story:

Doctor Who and the Gateway to the Stars

By Nix Nada

Somewhere in the distance, an alarm sounded a slow, sonorous chime. Something was very wrong. The Doctor sped into the console room and checked the readouts. Around him, the room shook and dipped as if shaken violently by some unseen hand.

"Seem to be caught in some sort of spatial vortex, like an artificial wormhole," he muttered to himself. Gripping the edge of the console with one hand to retain his balance, he reached out and turned on a small computer monitor. He raised his eyebrows in astonishment at the data on the screen. "Coming from… Earth? But they don't have that sort of technology in this era."

The Doctor sidestepped as best he could around the console to another panel of controls, pressing buttons, pulling levers and flicking switches as he went.

"It's using an enormous amount of power; it can't be a natural occurrence. This will require some investigation, I think."

The Doctor patted the console affectionately. "Sorry, old girl," he said. "We're just going to have to ride the wave, I'm afraid."

Reaching out, he slammed his hand down on a large red button. With a massive tearing sound, the room shook one last time and everything went dark.

o o o

Somewhere in the distance, a klaxon blared. Something was very wrong. Colonel Jack O'Neill sped into the Stargate control room to be met by General Hammond. Through the glass of the viewing window, he could see the Stargate itself, the shimmering blue of an open wormhole turning dark and twisted, like a stormy sea.

"What's happening?" O'Neill asked the Gate technician.

"I don't know, Sir," replied Harriman, glancing up from his computer screen. "SG-5 were on their way back when the Gate went…" he gestured through the viewing window, at a loss for an explanation, before deciding on, "…screwy."

General Hammond stepped forward. "Well, see what you can do to get them back. We didn't lose anyone on the mission, I'll be damned if we lose them on the way home!"

"Sir, yes Sir," replied Harriman, hurriedly turning back to his computer.

Just then, three points in the wormhole seemed to dent inwards, as if pulled from behind. With a sound not unlike a loud gulp, the three points shot forward suddenly, sending three soldiers flying through the Gate to land heavily on the floor.

"Get a medical team down there, now!" barked Hammond, as he and O'Neill hurried down to the Gate room themselves.

As they arrived, the men were already stirring. "Stay there," Hammond ordered. "A medical team is on its way."

O'Neill stared up at the Stargate with a frown. "Why is the Gate still open?" he asked, turning to look up at the viewing window of the control room. Harriman returned his look with a helpless shrug, which turned quickly to a wide-eyed look of terror. Harriman banged on the glass, pointing desperately at the Stargate.

O'Neill looked over his shoulder to see a large, rectangular dent in the rippling wormhole. As if heard from a long distance, a grinding, churning sound was slowly rising and falling.

"Get down!" he yelled, pulling General Hammond to the corner of the room. The three injured soldiers only barely managed to pull themselves to their feet and move out of the way before, with a massive tearing sound, the room shook and everything went dark.

o o o

When the lights came back up, the Stargate had closed and, sitting innocently in the centre of the room, there sat a large blue box. It had the phrase, "Police Box," written across the top, around the words, "Public Call".

General Hammond was the first to his feet, as a group of soldiers filed past him and set up positions, pointing their guns at the door of the box.

The door opened and a man stepped out. He was tall, wearing a burgundy velvet jacket and a ludicrously long scarf, with a wide-brimmed brown hat jammed over a mess of curls.

"Who are you?" demanded one of the guards.

The man gave a wide grin, ignoring the raised weapons, and lifted his hat in greeting. "How do you do?" he asked. "I'm the Doctor."

The soldier narrowed his eyes. "That's not a name," he growled.

The Doctor spread his hands in a gesture of helplessness and gave a wide-eyed stare. "But it's all I have," he replied.

As they spoke, O'Neill was joined by Daniel Jackson and Teal'c, who watched in confusion as the three returning members of SG5 were led away by medical staff.

"What's going on?" hissed Daniel.

O'Neill shrugged and absently rubbed his head where it had struck the wall in the dive to get clear. "I have no idea."

"Stand down," ordered General Hammond, stepping through the knot of guards. "Doctor, it's been a while."

The Doctor stared again, this time in disbelief. "Captain Hammond?" he exclaimed, breaking into another massive grin. "You haven't changed a bit! Well…" he trailed off, unconsciously tugging on one his curls.

General Hammond laughed and ran a hand across his bald scalp. "It's General, now. And I can't say the same for you, Doctor. Didn't you use to be a little… older?"

"Regeneration, old chap. Bit of a run-in with a giant spider. But what is this?" he broke off, staring in fascination at the large circle of the Stargate. He stepped past the guards as if they weren't there and turned back to General Hammond. "Is this what put out the artificial wormhole that caught my TARDIS?"

Hammond gestured to the guards that they were dismissed. "Actually, Doctor, it was your TARDIS that affected the working of our wormhole. Come on," he added. "We can discuss this in the briefing room. We have a lot to catch up on."

Hammond led the Doctor out of the Gate room, past the bewildered members of SG-1.

Teal'c raised an eyebrow as he watched them leave. "Who was that strange fellow?" he asked.

"The Doctor," replied O'Neill.

"Who?" said Daniel.

"Beats me," replied O'Neill. "Let's go find out."

As they left, O'Neill looked sideways at Teal'c. "'Fellow'?" he asked. "Since when did you say 'Fellow'?"

"I have been watching many re-runs of old Sherlock Holmes movies," Teal'c said.

"Oh," said O'Neill, a little surprised. "Well… those are some good movies."

"Indeed," replied Teal'c with a nod.

o o o

Samantha Carter stared down through the wide window of the briefing room at the TARDIS in the Gate room below. She pointed a finger at it with a puzzled frown.

"So, you really expect us to believe that you travel through time and space in that?" she asked.

The Doctor sat slouched in a chair, his hat resting on the table in front of him. General Hammond took a seat at the head of the table while the rest of SG-1 peered across the table at the odd new-comer.

In reply, the Doctor waved a hand at the Stargate. "Do you really travel to distant planets through that?" he said.

Daniel raised his eyebrows. "Touché," he said.

"Doctor," said Hammond, "I'd like you to meet SG-1. This is Colonel Jack O'Neill, leader of the team. You've just met Captain Samantha Carter. Daniel Jackson is our linguist and an expert on ancient civilisations. Finally, this is Teal'c, a rebel Jaffa. SG-1, I'd like you to meet the Doctor – a very old friend of mine. We met when I was posted to England as part of the United Nations Intelligence Taskforce. The Doctor was their scientific advisor."

"Naughty, naughty," said the Doctor with a mischievous grin. "UNIT is supposed to be top secret, remember? Can't have just anybody knowing about a military outfit dedicated to fighting off invasions from outer space…" He trailed off, looking around the table, realising that that was exactly where he was.

The Doctor coughed. "Jaffa, eh?" he said, changing the subject and studying Teal'c with a friendly fascination. "You were a servant of the Osirians?"

"Osirians?" interrupted Daniel. "I don't think I've heard that word before."

"That is an ancient name by which some have known the Goa'uld," explained Teal'c, then, to the Doctor, he said, "I have rejected the service of the false gods. I have dedicated my life to freeing my people from slavery and oppression."

"Good for you," replied the Doctor. "I'm all for the ending of slavery and so on. I'm very pleased to meet you – to meet you all, in fact." He lifted a hand to raise his hat, then noticed it sitting in front of him. He settled for lifting it a couple of inches from the tabletop instead.

A thought occurred to him. He stood and crossed to the window to get a closer look at the Stargate.

"I've seen something like this before. Something triggered a memory when you mentioned the goo… the goowa…"

"The Goa'uld," supplied Teal'c.

"Thank you," said the Doctor. "The Osirians, yes. It was… there were pyramids, mummies… Let's see… It was…"

"Giza?" asked Daniel.

"Mars!" exclaimed the Doctor.

"Mars?" asked Sam. "There's no Stargate on Mars. It would have been mentioned on the cartouche we found with all the Stargate addresses."

"Ah, well," said the Doctor, returning to his seat, "this one may have been omitted for a reason; you see, the pyramids of Mars were a prison for Sutekh."

Teal'c gasped. The normally placid Jaffa leapt to his feet, knocking over his chair.

"The destroyer!" he cried. "Sutekh was the most feared and despised of all the Goa'uld. He was the supreme system lord for many generations. Millions suffered an unspeakable existence under his tyranny."

"Before he was banished to the prison on Mars by the other Osirians," finished the Doctor. "When he broke out -"

"He broke out!" hissed Teal'c, gripping the edge of the table in fear.

"It's okay," said the Doctor. "I was able to trap him in a time loop. His body aged several thousand years in just a few seconds. He won't be troubling anyone ever again."

Teal'c closed his eyes, lowered his head, and took a few deep breaths.

"Forgive me," he said quietly. "A universe under the control of Sutekh would be unthinkable."

"I agree," said the Doctor.

"Do you have the Gate address for the Mars Gate?" asked O'Neill.

"Yes!" agreed Daniel. "Think of all we could learn – another Stargate and evidence of Egyptian culture on another planet in our solar system."

"I was thinking more along the lines of blowing the damn thing up," said Jack.

"What!" exclaimed Daniel.

"That Gate is a strategic nightmare," O'Neill explained. "It would make a handy little base of operations for anyone looking to attack Earth, wouldn't it? Being that it's just one door down and all."

General Hammond interrupted: "Whatever the reason, it looks like we need to check it out. Do you have the address, Doctor?"

The Doctor shook his head. "Sorry, General. I was a little caught up with booby traps and the like at the time."

"I might be able to get the computer to figure it out," supplied Sam, "if the Doctor can tell me exactly where on Mars the Gate is located."

"Happy to," grinned the Doctor.

"Then it's agreed," said Hammond. "You'll check out the Mars site as soon as Captain Carter can magic up the address. From what the Doctor says, I gather the site may be dangerous; SG-5 will back you up."

"Sir?" asked Jack.

"They weren't badly hurt by their bumpy return and they're keen to get back in the field. Besides," Hammond added with a mischievous smile, "they want to meet the man who taught them to fly."

The Doctor shoved his hat back on, looking sheepish.

Hammond stood up and clapped his hands together. "Okay, people," he announced. "Get ready to ship out."