He doesn't respond to the question about getting away. After all, they hadn't exactly –how can you ever escape– done that, either of them. "Everyone lost," he says as before. "Including the Daleks. No one to come looking."

The Master tuts at the cliche and that vulnerable flicker in his expression. "Too young to be such a cynic." And yes, he is well aware that Lucifer should be several thousand years old by now. But the Time Lords lived long enough themselves.