The ending of Tenet has meaning that could be lost on a viewer after only one viewing of the movie. How did The Protagonist (John David Washington) and Neil (Robert Pattinson) really meet? Does the ending mean that time can be changed or did it create a grandfather paradox? Who was moving forward and backwards (and doing what) in the final battle? What was Sator’s (Kenneth Branagh) plan and what did the future humans want? What do the silver capsules really do? Who fired the first inverse bullet shot during the opera opening sequence? And does this really set up a Tenet 2?