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
Richard Woolsey (Robert Picardo) took command of Atlantis, transitioning from a bureaucratic adversary to a dependable ally. Stargate Atlantis - Season 5
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. A significant romantic arc developed between Dr
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 Major Story Arcs and Notable Episodes Stargate Atlantis,
Dr. Carson Beckett returned as a regular recurring character after his clone was rescued and stabilized.