DAVID BIANCULLI, HOST:
This is FRESH AIR. Opening today, in many theaters, is the fourth in Michael Bay's "Transformer" series, "Transformers 4: Age Of Extinction." It's inspired by the Hasbro toys that turn mostly cars and trucks into robots. Another very different kind of apocalyptic, action movie that rolls out today is "Snowpiercer" by South Korean director Bong Joon-ho, who made the acclaimed giant monster film, "The Host." Film critic David Edelstein has these reviews.