Disclaimer: No, I am not the genius who owns Doctor Who. Yet.
"Don't worry about a thing, your Majesty. We're on our way!"
And with that, the Doctor had put the phone back down and hurriedly set to work at the TARDIS controls. The engines burst into life with a heavy jolt, making the Doctor, Amy and Rory lurch towards the floor. Amy managed to tear her smiling face away from the rising and falling time rotor for just long enough to exchange an expression of joy and excitement with her new husband. She was still getting used to that. She was married! She had gotten married, managed to bring the TARDIS into the reception, seen the Doctor's dodgy Time Lord dancing and was now off into time and space with her husband. How many newlyweds could say they had done that on their wedding day?
"Where are we going?" Amy asked the Doctor, though she still couldn't bring her gaze away from Rory. "What's the Orient Express in space?"
"Well, it does what it says on the tin!" the Doctor said, whilst setting about the controls, managing their flight. "Great big luxury space liner, based on the Orient Express from Earth, making its way out amongst the stars!"
"And what did you mean an Egyptian Goddess?" Rory asked.
"Ah, well, bit of trouble I'm afraid. The Goddess Sekhmet – should have been sealed into the Seventh Obelisk of Horus, after the fall of the Osirian Dynasty."
"What does that mean?" said Rory, stumped by the Doctor's ramblings.
"The Obelisk was a prison. There were seven layers of locking mechanisms – it was designed to be impossible to escape from, but obviously they didn't do a good enough job."
"But, how can there be an Egyptian Goddess, Doctor? They're just mythology aren't they?" Amy asked, while trying to steady herself as the TARDIS rocked back and forth.
"Well, she's not actually a Goddess, of course. She's a confederate of the Osirians, the basis of Egyptian mythology." the Doctor explained, before yanking on one of the console's levers. The control room jolted violently in response, knocking Amy and Rory to the glass floor.
"Oi! Can you be a bit more careful with the flying? This wedding dress wasn't cheap, y'know!" Amy shouted, as Rory helped her back up.
"Oh, stop complaining, Pond! We're about to land."
"Doctor, the person who phoned… you called them 'Your Majesty'?" Rory commented.
"Empress of the Pyramid Galaxy, currently on board the Orient Express, heading for a visit to Earth to see the resting place of her Galaxy's founding fathers – Egypt!"
With an almighty thud, the engines fell silent and the time machine finally steadied itself.
"We've arrived." the Doctor said quietly, before seemingly filling up with energy and running to the doors.
"Doctor, shouldn't we change first?" Amy called after him.
"Why?" the Doctor asked in a puzzled tone.
"I'm in my wedding dress!"
"Yes; you look lovely. Now, come along Ponds!"
And before Amy or Rory could say another word, the Doctor had bolted out of the doors, into the unknown. Rory flashed an almost apologetic look at Amy, before offering her his hand. She took hold of it, and together they went after the Doctor, boarding the Orient Express. In space.