Transformers and Trains at the Movies This Weekend

It must be sci-fi weekend at the movies: Those presto-chango Transformers are back for a fourth time, but the grownup movie this weekend is from a noted Korean director, who offers his unusual tale of global-warming refugees stuck on the ultimate nonstop train.   Transformers: Age of Extinction Mark Wahlberg, Stanley Tucci and Kelsey Grammer lend grownup presence to the latest toy-inspired Michael Bay heavy-metal fest, but when it comes to this series, there’s nothing more than meets the eye. …