Regarding the time paradoxes, the second part of your comment reminded me of a very interesting (and good) 1977 Czech film called "Tomorrow I'll Wake Up and Sca

Regarding the time paradoxes, the second part of your comment reminded me of a very interesting (and good) 1977 Czech film called "Tomorrow I'll Wake Up and Scald Myself with Tea"[0], in which some Nazis survive WWII. They get ahold of some anti-aging pills, and after centuries, hijack a time machine back to World War II in order to give Hitler the bomb, reversing the course of the war. However, their efforts are repeatedly stymied by comical time paradoxes. [0] https://en.wikipedia.org/wiki/Tomorrow_I'll_Wake_Up_and_Scald_Myself_with_Tea https://en.wikipedia.org/wiki/Tomorrow_I'll_Wake_Up_and_Scal...