I had this idea a while back and I thought it might make a good story.

Will be updated ASAP :)

*Edited - Thank you to Time-Twilight for pointing out that Martha wouldn't have known Jack at this point in time, so her being in this story wouldn't make sense. In light of this, I have removed Martha's parts and added Donna in her place*

Please review

-Star

"Cardiff! Capital of Wales! Not much to look at with the naked eye, but to a time traveller, it's brilliant!" the Doctor announced to Donna as they walked through the city, heading towards Mermaid Quay.

"Alright then spaceman, what makes it 'brilliant'?" Donna queried as she followed the Time Lord through the hoards of shoppers and commuters.

"A rift in time and space runs right through the city, strongest around here." The Doctor explained, gesturing to the water tower that stood in the centre of the quay. "The thing is, with any crack, things can sometimes slip through."

"Dangerous things?" Donna said immediately, already used to the fact danger was nearly almost present during her travels.

"Yup." He replied, approaching the tower. "So thanks to her Majesty Queen Victoria, a organisation known as 'Torchwood' is here to deal with anything that comes through. Except they don't always take a friendly approach to dealing with aliens, so I decided it would be good to check in from time to time, just to make sure they're not causing too much trouble."

"Trouble? Really Doctor? Have a little faith" a familiar voice called, catching the duo's attention. Donna recognised his voice and happily turned and ran to greet her friend.

"Jack! It's been so long!" Donna exclaimed as she stood before the man, whereas the Doctor stayed where he was, and gave no warm greeting.

"Donna Noble, God I've missed you" Jack replied flirtatiously, earning a scowl from the Time Lord.

"Captain Jack Harkness, I take it you're running Torchwood properly and treating aliens with respect now?" The Doctor asked in a cold a serious tone. Despite knowing that some of the things that come through the rift could be hostile, he did not approve of them being locked away.

"Well, let's just say I'm running things efficiently. Why don't you come see Doctor? I've got someone you're gonna wanna meet." The Captain offered, smirking.

"Who?" The Doctor asked, intrigued but concerned.

"You'll see." Jack simply replied as he offered his arm to Donna, who took it without hesitation and allowed him to lead the way, the Doctor following closely. The trio used the entrance in the shop and were greeted by Ianto, who was manning the desk. He gave the Doctor and Donna odd looks when they first came in, but became more relaxed when Jack explained who they were. But there also seemed to be a hint of sadness in his expression, like he'd just lost something he loved.

When they entered the main base, Gwen was quick to point a gun at the newcomers, holding her nerve even when she saw her boss with them.

"Who are they Jack? Why are they here?" Gwen demanded fiercely as she approached them, Owen and Tosh coming up behind her, also armed.

"Gwen, Tosh, Owen this is the Doctor and his assistant Donna." Jack replied with authority, then added: "You all know why they're here, and what must now happen now that he has arrived." The last part made everyone's expressions turn sad as they lowered their weapons. The Doctor even noticed tears forming in Gwen's eyes as she looked at him sadly.

"Gwen, we knew this day would come eventually." Owen said comfortingly as Ianto entered the room and joined his co-workers. Owen looked to Jack and asked quietly "should I go get her?", to which he replied with a solemn nod. Owen walked off, forcing back tears as he disappeared to the lower levels of the base, and returned minutes later with company. It was a teenage girl, with dark-hazel hair not reaching below her shoulder blades, with darker brown eyes, and wearing all black like the rest of the team. She saw the Time Lord upon arrival, then looked to Jack and the others for confirmation, and after assessing their expressions, matched it herself.

"Who are you?" the Doctor asked, insistent on a clear answer now. He took a few steps towards the girl and tried to determine why Jack insisted he should meet her, but he came up with nothing.

"This is Absentia." Jack spoke on behalf of the girl. "She's one of us, a part of Torchwood, but she's different. She isn't human."

"Then what is she?" The Doctor exclaimed, frustrated by the vagueness of the situation. Absentia came forward confidently to face the Doctor and answered:

"I'm a Time Lady, I'm like you."

The Doctor fell silent after Absentia's response, he just stared at her in shock. She remained expressionless for a while, but seemingly became uncomfortable and backed away towards Jack, who placed a hand on her shoulder.

"You've had another Time Lord here, and you never told me?" The Doctor said finally, angered. "I had a right to know!"

"We had no way to contact you, what else could we do?" Jack replied, also becoming angered.

"Doctor, he didn't mean any harm." Donna said to her friend, trying to calm him down, but it didn't work.

"How long have you been here?" He asked Absentia directly, more and more anger building up inside him.

"Torchwood has been taking care of me for 15 years." She replied, almost challenging the other Time Lord. "They found me as a infant and have raised me as one of them. I was given the name 'Absentia Harkness' to match my cover story that I am Jack's niece."

"What do you mean, they 'found' you?" Donna inquired as the Doctor fell silent once more.

"It's actually a funny story." Jack answered, ushering for everyone to sit down while he explained.