OK the first thing I need to say. Before my disclaimer, before ANYTHING:

This is the universe for this story:

There are different 'universes' for different fandoms but they are all perfectly aware of each other's existence and can pretty much visit each other when they like if they put in a little effort (e.g. with a TARDIS or other time ship, a wormhole, etc.) But it's not like, for example, the DS9 crew could fly back to Earth and go to London and Sherlock would be there. They are separate 'universes' that can be travelled between.

OK.

DISCLAIMER: I do not own or seek to make profit from Sherlock, Star Trek: Deep Space Nine or Doctor Who or any of their characters. Yes, Star Trek: Deep Space Nine indeed sorry it wouldn't let me put three categories so if you're here liking Sherlock and Who but not DS9, go watch it then come back. Like, seriously, watch it now (it's hella good). It used to be in the Sherlock/DS9 category but I've switched it to the Wholock because I think Sherlock and The Doctor are probably more major characters than Julian in this.

OK, I'm back, let's get this show on the road. This story is set before the end of series 2 of Sherlock sometime, before the Dominion war, and it's doctor 11. Rated T for physical whump EVERYWHERE (literally, within the first couple of chapters (I really like whump)) and probably some sex reference later on. Nothing, like, explicit sex or anything though.

A thing: Like this introduction, this is probably going to be long. And full of whump. Like, seriously, so much whump. May God have mercy on your souls.

'The wormhole's opening. It's the shuttle.'

'Prepare docking bay 1 for their arrival.'

'Aye, sir' Dax tapped on her console, sending the instruction, as the shuttle glided towards Deep Space Nine. It was a normal morning on the station; most of the senior officers were on their duty shifts in ops watching the day-to-day passing of ships through the sector. The shuttle had just come back from a possibly trade opportunity in the Gamma Quadrant, carrying Kira and Odo. Not much had happened in the past few days out of routine and everyone was relaxed. Julian had made his way up to ops leaving a couple of nurses on duty and was leaning against Dax's console chatting to her they filed crew reports with O'Brien at his console behind them. They pause for a few seconds to make sure the shuttle way safely docked and then turned back to the reports. However before they could look at the next one, the console beeped again. Dax turned back and looked at the readings. She frowned.

'Sir, it seems like the wormhole is opening again.' Sisko walked over from where he had been standing outside his office as did the Chief.

'What? What's coming through?' he asked.

'Nothing,' started Julian, also looking at the console. 'But there does seem to be some sort of ship there…'

'Barely big enough for one person though' continued Dax. 'It looks approximately 2 metres high, maybe a metre wide.'

'Put it on the viewscreen' said Sisko, turning towards it. The viewscreen flicked on and Dax zoomed in until they could just about make out what looked like a small blue box spinning around through space. Dax tried to follow it on its unruly path but it was going all over the place.

'What is that?' wondered Julian out loud. As they watched, the box continued spinning and then started flickering as if it was in the middle of a transport. At the same time, a whumming noise made the four officers turn towards Sisko's office. It started quietly but by the time the officers had noticed it, it filled the entire room.

'Something's materialising' observed O'Brien as the box started to materialise.

'Intruder alert' said Sisko and an alarm came on but it was drowned out by the materialisation noise. Julian walked a little closer and looked at it.

'Something's wrong' he said, frowning.

'What?'

'I don't know. I can just hear it. I don't think we'll need the intruder alert.' As Julian said this, the box fully solidified outside the office. Lights were flashing through the windows and Julian could vaguely hear yelling inside. He walked up to the doors and pulled on them, trying to open it, but it was firmly shut.

'I'm going to get a medkit,' he said, running for the turbolift, 'I can hear someone in there.' Sisko and Dax walked up to the doors and read the panel on the front. Pull to open. The strange ship was shaking on the spot slightly and smoke was starting to leak though the doors as well as a muffled alarm sound. Dax banged on the doors and stood on her tiptoes trying to look through the frosted windows.

'Hello?' she called, 'Is anyone in there?' A moment passed followed by more muffled yelling from inside. The turbolift arrived in ops and Julian jumped off before it had even stopped and ran over to the doors. Jadzia pulled on the door again. She started to yell through the door again but the door suddenly flew open and smoke poured out, making them all take a step back. The officers stared in. Through the thick smoke they could barely see anything, but they got some idea of the size.

'But it's...' started O'Brien incredulously.