A Real Pain (out Dec 26) is a dark comedy about two 30-something-year-old American cousins who go on a week-long tour through Poland to understand their family heritage. It’s a wonderful character study with Kieren Culkin having the flashier role as the bipolar Benji while Jesse Eisenberg, who serves as writer-director, is also excellent as an introvert with obsessive-compulsive disorder. The film deftly mixes comedy, drama and heart in achieving its goals. Grade: A.