Go on another sci-fi voyage with Voyager! When Commander Chakotay and Tuvok go to explore a dark matter nebula, the Commander is left brain dead. Can Chakotay be saved?, After Tuvok and Chakotay return from investigating a black nebula, crew members become possessed by an alien presence., An assault on the shuttle leaves Chakotay fighting for his life, with his bioneural energy down to dangerously low levels. As the crew tries to discover the cause of his illness, Tuvok also begins to act in a peculiar manner, drawing everyone toward a showdown in a dark-matter nebula., Tuvok is attacked by aliens who take over his mind, and Chakotay fights to save his life and the lives of the crew., After Tuvok and Chakotay return from investigating a black nebula, crew members become possessed by an alien presence. Durst: Brian Markinson. Mrs. Templeton: Carolyn Seymour. Tuvok: Tim Russ. Janeway: Kate Mulgrew. Paris: Robert Duncan McNeill.