Anachronism

An Anachronism is a concept of an object, idea or being present in a time which is not related to its own. The Doctor called Ace's stereo that she was carrying around in Shoreditch 1963 a "dangerous anachronism". (DW: Remembrance of the Daleks) When Anti-Time began to bleed into the universe anachronisms began to affect history, having a disasterous effect on the Web of Time. (BFA: Neverland)