Subtitled Inside The Pro-Nuclear Movement, Frankie Fenton’s doc mounts an engaging but limited take on a heated issue. Opening with a Japanese nuclear engineer’s complex feelings about nuclear power, Fenton then gives the stage to scientists and self-styled “rebels” advocating for thorium as an answer to climate change. Whether they are staging demos or debunking fears, their fervently held positions make for heartfelt but frustrating viewing. Stressing rhetoric and slogans over rigorous study, Fenton’s portrait risks looking more like a slickly emotive promo reel than a proper investigation.