for a cyberman episode, they are super super different here. they basically drop the whole twin planet thing in later stories mostly. the s2 cyberman 2 parter has them from a parallel earth and pulls off a similar concept much better. the things i really liked about this episode was that it was the first time the show ever feels diverse. there's an actual black character, and the space hub thingy has people clearly from all around the world taking part in these space missions, and the antartica base has some clearly non british people. all the mainest characters are still white and british though. i like tito he was cute but he dies pretty quick. i thought the 3rd episode where it suddenly became all about defeating the human captain was really weird - the cybermen should be the focus, not some random guy who tbh feels kind of in the right for what he was doing! i wish they sold us more on the father/son thing and deepened that relationship, at least gave the son a name!! the unique title sequence is so appreciated though. i think the doctor and polly honestly did very little in this story. i dont even understand why the doctor regenerates at the end?? ofc it's the first one so they didn't  have the rules for regeneration down yet, but it is still odd. it's also weird that this is one of few time that the doctor explictly already knows what is going to happen roughly, which is probably why he takes a back seat