The Doctor sat quietly in the TARDIS, sipping a cuppa tea, while enjoying the soothing humming. He was glad of the silence. Martha had decided to go home to her family for awhile after feeling guilty about not spending time with them. Sarah Jane was taking a break from running around with him to go on her own small yet significant adventures of her own. Jack was a mess back at the Torchwood Institute. He had made sure to tell Ianto to add two sedative to Jack's coffee everyday and in two weeks because of his immortality and his slow arousal to drugs such as sedatives he should be sleeping like a baby.
He sat and stared at the letter Jack had given to him and with excitement and curiousity opened the envelope and began to read. It was two pages long and just as Jack had said was about Rose's life in the parallel universe, but as he got to the end his eyes widened and his eyebrow rose.
"What?"
"…There is a woman whom you know by Gwen Cooper. She fell through the rift. It's strange because it's like Bad Wolf all over again only worse. Her head was bleeding last time I checked because she can't control all of the things she has seen through the rift. I just thought even though I know you won't ever read this that you should know that she's alive and we're watching out for her…"
The Doctor scanned the rest of the letter as Rose told how Gwen misses Jack and yada yada when something else caught his eye.
"What? What?"
"…There's a crack in the rift. The tiniest crack, but it's there. Gwen thinks she can get back. For reasons unknown I believe her. She has some sort of control over the rift and if she's going back I'm going with her. I need to see the Doctor again. It's just not the same without him and this may be my only chance. I understand it's dangerous and I we may not come out of it alive, but I don't care and I don't think she does either…"
"What?!"
The Doctor ran to the console as he began to search the rift and there was indeed a crack in it. The tiniest crack he had ever seen. He really should do the right thing and close it, but what if Rose and Gwen were already travelling on it. If he closed it they could be stuck in space forever and he bloody well couldn't risk that. But what if it was a sign. A chance to finally be reunited with Rose once and for all.
"Well if they're going to try and get through I might as well help them," he told himself though everything else around him argued against it.
The TARDIS seemed agree with the Doctor humming her approval. The Doctor knew the old girl missed Rose just as much as he did. The Doctor set the coordinates and widened the crack enough to be pulled through. He passed through time and headed straight into the rift still seeking to keep control. There was a bump and a spark as the TARDIS began to head down through the rift.