Provoking a desire for audiences to watch a movie again in order to further study how all the narratives connect isn’t exactly a badge of storytelling honor. Writer/director Christopher Nolan continues his march to cinematic glory with two lofty experiments within one compact and technically thrilling WWII film in Dunkirk (B) and sometimes succeeds in spectacular spurts. Nolan employs two unconventional approaches in telling the story of stranded British, Canadian, French and Belgian soldiers retreating to safety across the English Channel in small boats when large watercraft are sitting targets. One of these hat tricks – creating a war movie without showing any of the German army antagonists on screen – might have been enough. But by depicting three intercutting stories on a trio of timelines – newcomer Fionn Whitehead as a soldier in a weeklong journey across land and sea (where an inert Kenneth Branagh as a naval officer plots events from a pier), Mark Rylance as a citizen on a one-day timetable guiding a pleasure boat into enemy territory to save as many servicemen as possible and Tom Hardy as an ace flier engaged in one hour of hitting enemy targets from the skies – Nolan scores a paradoxical panorama that is intriguing but shuts out emotionally satisfying undercurrents. It’s fun to treasure hunt for how the three sub-stories interact, but to what end? The technical triumphs of tick-ticking musical tension (a restrained Hans Zimmer), ultra-real sound design, eye-popping stunts and the general eschewing of typical battle tropes such as backstories or motivations all contribute to the firm’s originality. But in trying so hard not to state the obvious, Nolan forgoes characterization nearly completely. In a story that’s basically about caring, he doesn’t give entry points for audiences to invest specifically in any of the individuals in the collection. So it’s a glorious visual piece of impressionism, an agile brain teaser and a so-so war thriller. Blunted by bland fictional characters standing in loosely for real-life heroes, the film is a new form of cinematic Sudoku in which the major victories aren’t given much ado while Nolan counts his creative flourishes.