Cdric Klapisch's sci-fi comedy Peut-Etre, showing at the Phoenix as part of the Martell French Film Tour, begins with a workable (if hardly original) premise. I

t's Millennium Eve and Romain Durais's refusal to start a family with girlfriend Graldine Pailhas causes a portal to open in time that allows his son, Jean-Paul Belmondo, to return from the future to beg for his existence. The sight of 2070 Paris being Eiffel-high in Saharan sand is also a sly touch. But once Durais's descendants commence their temporal jauntings, the action becomes as contrivedly trite as a Hollywood concept movie. Belmondo shines over an energetic supporting cast, but the ideas and the gags just aren't there.