"Yes, but he doesn't connect all of them. Lisa... I don't think she knew the Doctor." Ianto pressed his lips together, thinking of how he'd run into the varient of his girlfriend who was here. He really hoped she hadn't returned to where and when she came from.
"Though she's the only one I've met who I'm not certain knows the Doctor. And I have met another version of you already, sir." He straightened his jacket again, not particularly inclined to share the details of that. "The connection doesn't give much insight into why the particular people, why the points on their timelines, and the particular realities that they come from."
He sighed softly, looking up at Jack, his face tilted slightly down. "It's all very frustrating for me, sir. To have some of the pieces, but not all of them."
Because he was used to being the one with the whole puzzle, holding pieces back from those looking for them. That was what he did: Torchwood Archivist, the one everyone went to for information on aliens and alien technology.