Tenet—one that commands audiences to pay full attention lest they be left behind—is the recent discovery of a temporal anomaly, possibly man-made, that can send certain objects backwards in time, rather than in the usual direction.
This is how director Christopher Nolan does time travel. Actually, to hear him tell it, this is how he does a spy thriller, inspired by the Bonds of his youth and enhanced with all of the mind-bending trappings we've come to expect from one of filmdom's brainiest auteurs. The central conceit of
Original Resource is Sound & Vision