Season four furthered and even embellished upon the changes to the franchise already seen by the middle to end of season three. "Scorpion, Part II" concluded the season three finale and—most crucially to the future of the series—introduced a new character, Seven of Nine. One episode later, Jennifer Lien left the cast and Kes departed Voyager, not to return until the season six episode "Fury" . "So, how's the newest member of our family?" - Janeway, to The Doctor ("The Gift" ) "This ship has become our home, it's part of our family." - Janeway, to Tuvok ("Year of Hell, Part II" ) ) )