genuinely something about the first four seasons of doctor who that I really love is the theme of everything having its time. it's explored in different ways - with 9 & the bad wolf arc, it's ultimately hopeful. there's death but then there's life, things end and then they begin, the universe moves forward; with 10, it's ultimately tragic, he obeys this simple law over and over again, bending until he breaks & can't anymore. the mortality of things, even things built to last forever, the endless hope for better, for kinder, for newer... it's real & raw & gets me every time