Temporal paradoxes not only figure prominently in the Most overused 100 Star Trek episode plots but are the well most dipped-into when script-writers need some techno-babble that claims to explain something without actually meaning anything at all. Them, or gravimetric phase-shifts. The Butterfly effect was a full-length movie about a temporal paradox, though mostly about being a teenage fuck-up whose every effort to patch things up makes things worse, which he could have done without the muss and bother of time travel.