not entirely sure how i feel about this one tbh. i dont like the sensorite design much. i think the idea of the doctor going and fixing a planets problems is compelling. i liked in the aztecs that barbara was using her history knowledge, i would have liked it in this one if ian used his science knowledge more. the engagement between the humans and the sensorites, it seems like this is all taking place prior to the eventual conquest of the sensorite planet by humans, that's the vibe it gives. i think the gone mad humans were interesting but they needed to be more developed, not just brought out in the last episode. we needed a bit more time with them, as apparently they are what the story was inspired by. also the tardis team brings up the caste systems and it seems like they will develop this more but instead it is just dropped, no arguement that they should get rid of the caste system and we spend basically no time with the other castes, we have little understanding how sensorite society functions. this serial i think first marks the begining of doctor who canon, with the team refercing past episodes, the doctor expressing his dislike of weapons and the first(?) reference to Gallifrey, and ideas about susan and the doctor travelling before they met barbara and ian