The trailer for the spooky alien abduction thriller "The Fourth Kind" (above), which hits theaters Nov. 6, bears an immediate stamp of authenticity: a straight-faced Milla Jovovich walks toward the camera while identifying herself as the actress portraying Dr. Abigail Tyler, the movie's heroine. In subsequent quick-cut scenes, some of which look like home video footage, Jovovich interrogates terrified patients, all of whom recount similarly foreboding extraterrestrial encounters. At least one person appears to lapse into...