Steven Spielberg's second smash hit, Close Encounters of the Third Kind is an effective, optimistic, and visually appealing film.  In the light of current special effects, it's showing its age, but the story still retains wonder and interest.  Richard Dreyfuss is very effective as the man who sights a group of U.F.O.'s and then becomes obsessed with them.  Others that have made sightings share the obsession, including a woman whose child is abducted by the aliens.  A seed is implanted in their minds that draws them to Wyoming.  Their stories are intercut with the story of two scientists (played by Truffault and Baliban) who are investigating the strange re-appearance of ships and planes that have been missing for years, and which turn up in strange locales.  They, too, receive a message (along the more conventional method of radio contact) to head to Wyoming.