Happy Accidents, a flaky and charming sci-fi romance from Next Stop Wonderland director Brad Anderson, succeeds because the world within the film seems so grounded and comfortingly real despite the film's airy premise. Marisa Tomei transcends the thankless role of skeptical New Yorker/recovering co-dependent Ruby Weaver, on the lookout for love while second-guessing her every move with the help of an unnervingly frank therapist (character actress Holland Taylor, the real-life aunt of the director). She meets an affable, spacey bachelor named Sam Deed (Vincent D'Onofrio, always unpredictable), who counts an interest in polka and an intense fear of domestic animals among his quirks. No biggie--Ruby just chalks it all up to the fact that Sam is from Iowa, never suspecting that even a goofball like him might have something to hide. But when Sam confides that he's actually a time traveler from the year 2470, Ruby has to choose between deep-sixing an otherwise satisfying love affair or facing the prospect of being half--the boring half, no less--of a postmodern Mork and Mindy. Cute.