Steve Martin plays a mobster who turns state’s evidence against his buddies and hides out in a small town in California, where he and other squealers get back into business in a buddy comedy written by Nora Ephron and directed by Herbert Ross. Script and direction are both fairly slapdash, but the actors and the overall sweetness keep this chugging along on some level (in spite of the one-noted aspect of Martin’s funny but limited impersonation of an Italian hood). Rick Moranis plays the FBI agent in charge who winds up as Martin’s buddy; Joan Cusack (especially good) is an assistant district attorney a full head taller than Moranis whom he winds up romancing. With Melanie Mayron, Carol Kane, and Bill Irwin. (JR)