It's all AU.

The Master caught sight of some Doctor casually sitting on park bench, nose in a book. The Doctor looked fairly relaxed, which was a good sight. He gave the Doctor a sunny smile, and small wave, but wasn't sure if he shouldn't disturb him further. So, he didn't immediately stop.

The Master had finally given in and investigated the sewers. He'd poked a bit, decided perhaps a little too quickly that there were no vampires down there, and emerged gratefully into the sunlight, removing his handkerchief from over his nose and gazing down mournfully at his previously spotless, and now ruined, shoes.