Written and directed by the sisters Leila Conners Petersen and Nadia Conners, and narrated on- and off-camera by Leonardo DiCaprio, who served as one of the producers, “The 11th Hour” attempts to stave off helplessness, and the nihilism that often follows it, mostly by appealing to our reason.
In one interview snippet after another, dozens of scientists, activists, gurus, policy types and even a magical-mushroom guy go through the arguments, present the data and criticize the anti-green faction, putting words to the images that are liberally interspersed between these talking heads like mortar. Every so often, Mr. DiCaprio pops up on screen to interrupt this show and tell, squinting into the camera and pushing the narrative to the next topic.