SARAH: "What's gone wrong this time?"
DOCTOR: "Nothing. Nothing at all. What makes you think something's gone wrong?"
SARAH: "Because you always get rude when you're trying to cover up a mistake."
DOCTOR: "Nothing of consequence. Slight overshoot, easily rectified."
SARAH: "Come on, where are we?"
DOCTOR: "We've come out of the time vortex at the wrong point, that's all. A few years too late."
SARAH: "How many?"
DOCTOR: "Thirty thousand."
I've posted a review of the Fourth Doctor story
Planet of Evil over at my journal, if anyone's interested in reading. :)