I really like the concept of the travelers visiting a civilization then going back to it some hundreds of years later. It's a really cool idea that I kinda wish they'd try again at some point because I don't feel like they lived up to it's potential here. Sure the civilization has undergone a massive role reversal and hearing the travelers talked about almost as myths is neat, but beyond some details like those it doesn't do anything new with it. This show has already done a curing a plague episode (although they do approach it in a different manner here so I can let that one slide) and there have been so many freaking revolutions at this point I have a hard time caring about them anymore. The Monoids have a really cool design, but the way they go from slaves to basically the very thing they fought for freedom against was pretty disappointing. When I first saw them I really thought they lived equally with the humans (of course things could have gotten worse for them after the Doctor left or maybe it already was just behind closed doors), but after they gained power I would have really liked to see some of them try to work out a balance between them and the humans. Instead they're all just cartoonishly evil.
Steven gets a whole lot less to do here, they really should have kept Vicki in this group because he spends most of his time here practically babysitting Dodo. Its kind of a let down because I still genuinely enjoy his character and Britbox only has 4 serials with him in them so one holds out hope they'd at least be his best ones, but then you get something like this where he kinda fades into the background. Dodo is so annoying, how we went from Vicki to her I'll never know (because those episodes aren't on Britbox so I'll look into them when I'm done with the ones that are). She feels like every kid character shows add to relate to a younger demographic, but they're written by people who don't know anything about kids so they come across as caricatures. Her sense of fashion is good though so she has that going for her.