I'm not sure if I like how completely opposite 12th is compared to 11th and 10th.. "it is protected!" and "I've put a lot of work into it" vs "it's not my planet it's not my moon it's not my business. How he lost all of his compassion, handling kids etc".. I just don't know, but on the other hand I'm very interested where it all goes to. What's the idea behind such alien and dark doctor, what do the creators want to tell us in the end.. Is it Waters on Mars span across whole season/12th regenartion lifespan about how he slowly turns evil?