Star Trek: The Next Generation & Doctor Who: Assimilation2
Doctor Who and Star Trek are two of the longest running franchises ever, so it makes perfect sense that they might crossover. Still, it’s a bit jarring to see the very British Doctor Who meet the rather American Star Trek. In the case of Assimilation2 , it’s pretty interesting because you have the Doctor and the Enterprise facing off against the Cybermen and the Borg, the former being generally accepted as probably the inspiration for the latter. Both are cybernetic races who want to make you like them, and the Cybermen appeared about twenty years before the Borg. Whatever the source of inspiration, it makes for some really cool crossover goodness.