The Time Monster suffers from a sudden tonal shift a little over halfway through, side characters that seem like parodies of themselves, and a meandering plot

But by god it's fun

I liked everyone having to say TOMTIT with a straight face. I enjoyed side character scientists Feminist and her assistant Gay Man. "Male and female are just shapes" non-binary Kronos was an inspired choice. And, let us not forget the two best lines in all of Doctor Who appear in this serial: The Master's "I'm sorry about your coccyx too, Miss Grant." and Jo's "I'm fine! Dead, of course, but I'm fine."