The Doctor goes a bit too far in self improvement.
I chose to read this episode as an analogy for tech support, and what happens when you let the end users too much freedom to upgrade their computers. Just remember, your computer at work is locked down for your own good!
The Doctor, and especially his alternate personality, is good. It would’ve been nice if the alternate personality exhibited any brains, rather than being a simple one note ‘if it feels good do it’ monster, but there isn’t a lot of time, and the change in acting is very nicely done.
461 down, 276 to go.