Jack O'Neill (Richard Dean Anderson), SG-1's driving force, is missed, but Atlantis has a strong replacement in Major John Sheppard (Joe Flanigan), easily the most charismatic member of the new team. Like O'Neill, Sheppard is a wiseacre and a loose cannon, as well as a superb pilot with an innate understanding of the Ancients' arcane technology. His humor, humanity and conscience provide a welcome contrast to the other characters, especially brilliant-but-neurotic Dr. Rodney McKay (David Hewlett) and ultra-serious project leader Dr. Elizabeth Weir (Torri Higginson), who has little to do but give orders and stand up for her people. The Wraith, who resemble a vampire mutation of the albino blues guitarist Johnny Winter, are the focus of most of these 19 episodes (including the pilot). These bad boys will stop at nothing--nothing, I tell you!--in their quest to snack their way through every galaxy in the universe, with Earth their ultimate feeding ground. And while the final four episodes, dealing with the Wraith's massive attack on Atlantis, end with an unsatisfying cliffhanger (basically, nothing is resolved), earlier shows effectively keep their ominous presence in the forefront. The episodes in which the Wraith play little or no active role are often compelling as well, including "Thirty Eight Minutes" (one of our heroes' "puddle jumper" spacecraft gets stuck in the stargate), "Childhood's End" (we meet a race whose members are convinced that only ritual suicide is keeping the Wraith at bay), and "The Eye" (a planet-size hurricane/tsunami bears down on Atlantis). As is the case with SG-1, the visual effects work, especially by TV standards, is excellent; in fact, one might wish for bit more cool sci-fi action and less talk in some of the episodes. Special effects include commentary (by directors, writers, and/or actors) for every episode, as well as the occasional behind-the-scenes featurette. --Sam Graham