Put aside thoughts of TARDIS-like technologies rewriting history. This kind of time reflection is even weirder. And, it seems, actually possible after all.
By the 1970s, it was becoming clear that there was an analog for spatial reflection in the time component of a quantum wave of light. Change the medium a wave is traveling through quickly enough, in just the right way, and the temporal component of the wave will change with it.
The effect of this reflection in time isn't going to rip a hole in reality. But It will shift the frequency of the wave, in ways technology could exploit across varied fields like imaging, analogue computing, and optical filtering.