In the Shadow of the Moon (2019) (SPOILERS) One time, it would be satisfying if the main protagonist in one of these Grandfather Paradox constructions had done with the inherent inescapability of it all and expressly set out to blow the bloody doors off. If Boyd Holbrook’s increasingly bedraggled, hairpiece-hampered ex-cop, on realising that’s his granddaughter on the beach, the initiator of all these time-travel, would-you-kill Hitler murders – notably, there’s no discussion of whether this is a morally unconscionable mission, presumably because those responsible for kicking off the future civil war are hateful racists, so there shouldn’t be any debate on the matter – had just shot her in the head, that at least would have saved his younger, less chronologically-aware version from pushing her in front of a train.