Somewhere within the vastness of time and space--or, more specifically, without the vastness of time and space--a man and his boss were speaking within a void. Somewhere else, not without space, but within, a man flew in a TARDIS, going both nowhere and everywhere.
Something was wrong. There was an alarm going off on the TARDIS console, not quite the terror-inducing cries of the klaxon alarm, but a beeping of a registered error. If he ignored it, the klaxon could start, but this was still something he could fix. Even if he couldn't, he would still go, because something was wrong with the Department of Temporal Investigations.
Oh, of course he wasn't supposed to know about it, but he wasn't supposed to know about a lot of things. But UNIT had a lot of information on a lot of things, and he'd spent a lot of time there over the years. Besides, you didn't spend as much time in and out of time as the Doctor did without learning about who else was out there doing the same thing.
He didn't quite know what was wrong, only that something was, and that the impact could be great. So, if something was sick, if there was a wound in time, what better to do than call a Doctor?
Not terribly far from where the other man exited into the park, the Doctor landed the TARDIS. It reminded him, as it often did, of a junkyard so long ago. He missed that place, sometimes. He missed the people. He missed so many things. But now wasn't the time to think about that. Now he had a crisis on his hands, and nostalgia wasn't going to do anything to help him to solve it.
The idea of past and present meant nothing to him, the idea of what was now, and what was then. There was no past, no future, no present. Only time. And for this matter, the time was the early twenty-second century. Nothing terrible happening here, for the most part. At least, not counting the imminent destruction of time, but he was going to fix that. He had to. He was very attached to the existence of time.
The park was nice, for what it was worth. Beautiful. People enjoying themselves, exercising and talking, a man talking to his cat with a portable scanner in his hand...
Well, that was interesting, wasn't it?
He smiled to himself, and he approached.