Hollywood's film archives overflow with the carcasses of dismal movies based on lame '60s and '70s television shows, a syndrome that shows no sign of abating. But here's evidence that the reverse effect, turning a movie into a TV series, can have surprisingly positive results. Indeed, based on the 21 episodes produced for the first season of Stargate SG-1, it could be argued that this show is significantly better than the 1994 feature it's derived from.The central conceit of the original Stargate--the existence of an artificially created "wormhole" through which one can travel to different worlds light years away from Earth--was an intriguing one. In seizing on the obvious possibilities for expanding on that premise, series executive producers-writers Jonathan Glassner and Brad Wright have smartly retained some of the film's basic elements (its amalgam of myth and theoretical hokum, or the ongoing clash of wills between scientists and soldiers), while adding a variety of fresh ideas (including new characters, new locations, and a welcome dose of humor, much of it supplied by Richard Dean Anderson, MacGyver himself, who replaces Kurt Russell in the central role of Colonel Jack O'Neill). The result is a show with multidimensional heroes and villains and consistently compelling story lines (many of them introduced in the pilot and carried forward through subsequent episodes) balancing excellent special effects and production values. All this and full frontal nudity, too (at least in the aforementioned pilot). Who can resist?