As someone who’s been developing an allergy to Robin Williams over the years, I didn’t exactly welcome the idea of his playing the clergyman from hell as he conducts a souped-up version of a rigorous marriage preparation course for a Chicago couple (Mandy Moore and John Krasinski). But even if I could have put up with the unpleasantness of this as comedy, I still would have balked at the eventual portrayal of this monster as an angel in disguiseeven as he’s monitoring the couple’s every move from a surveillance van to make sure they don’t indulge in premarital sex. Director Ken Kwapis (The Sisterhood of the Traveling Pants) gives this script by many hands a certain gloss it doesn’t deserve. PG-13, 100 min. (JR)