Audrey Niffenegger's fanciful tale puts a different spin on a familiar topic, ­being almost exactly a 50-50 split between science fiction and romantic drama. It works mainly through very likable performances by Eric Bana and Rachel McAdams, who manage to seem like a real couple as well as people you care about. Bana is the man who comes back from the future, always without clothes, Arnie-style. It's one of many oddities of German director Robert Schwentke's film that he never talks about the ­future, though he's not above fixing a lottery win to the benefit of his partner. The gradual body fade-out pre-travel is nicely pulled off and helps you over those bumpy plotholes.