Just watched two more episodes:
The A-plot with the alien of the week was underdeveloped and uninteresting, but I did enjoy the B-plot with the Doctor losing his memory. I am curious to see what comes of all this for the Doctor.
My, my, my. This was quite a ridiculous episode, full of plot holes and logic flaws. It did have its redeeming qualities, though. Good continuity with TNG and a handful of humorous scenes.