Dr. Carson Beckett returned as a regular recurring character after his clone was rescued and stabilized.
Colonel Samantha Carter (Amanda Tapping) left her command role to return to Earth for the Stargate SG-1 storyline "Continuum" and to pursue other projects. Stargate Atlantis - Season 5
Stargate Atlantis Season 5 , the series' final season, marked a significant shift in leadership and tone as it wrapped up major storylines involving the Wraith and the rogue Michael Kenmore. Key Character and Leadership Changes the series' final season
A significant romantic arc developed between Dr. Rodney McKay and Dr. Jennifer Keller, though it received mixed reactions from the fanbase. Major Story Arcs and Notable Episodes Stargate Atlantis, Season 5: mariness - LiveJournal Season 5: mariness - LiveJournal