I think that The Krotons is a bit underrated. I find it to be a kind of fun story where we can see what happens when a population becomes too reliant on one great source of knowledge. I think that there are some parallels to be made to how people treat AI today, and even if there is great knowledge, it can also mean that people miss other information. It is not the best story in the series, but I gave it a 3.5/5.
Not many Troughton stories left of this rewatch. I love him so much. What a great and fun actor he was!