This week at the movies, Robert Langdon is back on the case, investigating shadowy machinations around the Catholic Church in Angels & Demons, starring Tom Hanks and Ewan McGregor. What do the critics have to say? The Da Vinci Code was a worldwide phenomenon; adapted from Dan Brown's bestseller, it raked in box office receipts despite widespread critical derision (and the threat of boycotts from Catholic groups). The good news is that critics find the follow-up, Angels & Demons, to be tighter and more exciting; the bad news is that their reaction is still pretty tepid.