An acclaimed cast that includes Joe Flanigan, David Hewlett, Rachel Luttrell, Jason Momoa and Amanda Tapping returns for Season 4 of the incredible Stargate Atlantis series. Colonel Samantha Carter (Tapping) takes charge as the city's new leader, facing new and daunting challenges, including joining forces with the dangerous Wraith in order to fight a common enemy - the seemingly unstoppable Replicators. Disc 1: - Adrift - Lifeline - Reunion - Doppelganger Disc 2: - Travelers - Tabula Rasa - Missing - The Seer Disc 3: - Miller's Crossing - This Mortal Coil - Be All My Sins Remember'd - Spoils Of War Disc 4: - Quarantine - Harmony - Outcast - Trio Disc 5: - Midway - The Kindred - The Kindred, Part II - The Last Man