Considering the TARDIS doesn't want to have anything to do with him and Peter actually chased down Gabriel the last time they met, 'stalking' would be a pretty strong term for how the two of them are treating him. It's how it feels to him right now, though, given how often he seems to run into the pair and how long it always takes to extricate himself.

"I did, actually," he says, sounding a little surprised even to recall it. "The first time I met her, in a dream." Because the idea of teleporting in dreams felt fairly safe, right up until he appeared in Lucy's bed.