Twitter Capsule:
When it comes to predictable, unsatisfying, overly-twisty time-travel movies, this is the greatest to come along in decades! Ethan Hawke is terrific, and Sarah Snook gives a star-making performance. Though nothing comes as a surprise, you are nonetheless riveted by the characters and the directorial style—at least until the inevitable letdown that most any film based on a Robert A. Heinlein short story like this will undoubtedly deliver. I can only imagine how much more effective this must have been to read rather than experience as a movie, but I commend the effort.