Big Fish

The worldwide demand for seafood is soaring. On today’s show: Time correspondent Bryan Walsh describes the exponential growth of fish farming. Then, filmmaker Tsui Hark, part of Hong Kong’s New Wave, discusses his long career and his mega-hit films “Detective Dee and the Mystery of the Phantom Flame” and “The Blade.” Jason Zinoman explains why the 1970s were the golden age of modern horror films. Plus, we’ll tale a look at epigenetics and how environmental factors can affect our genes.