An enjoyable episode that finished an enjoyable series
Some fine acting from the The Doctor and Clara, a series in which the Doctor's morality is put under the lens, siome nice character driven episodes, a few properly scary ones. Some laughter, a few damp eyes and the return of the master (and no she's not dead).
Overall a cracking return to form for what is - let's face it - a kids show that adults can enjoy watching too.