Title from container.

Contains all 20 episodes from the fourth season.

Special features: Disc 1: Commentary on "Adrift" by co-executive producer/writer Martin Gero and director/supervising producer Martin Wood; commentary on "Lifeline" by director/supervising producer Martin Wood and actress Amanda Tapping; commentary on "Reunion" by executive producer Joseph Mallozzi and director William Waring; commentary on "Doppelganger" by executive producer, writer and director Robert C. Cooper and VFX supervisor Mark Savela; "A new leader: Amanda Tapping joins Atlantis" and "Mission directive: 'Doppelganger' with Robert C. Cooper" featurettes; photo & design galleries ; Disc 2: Commentary on "Travelers" by executive producer/writer Paul Mullie and director William Waring; commentary on "Tabula rasa" by producer/writer Alan McCullough and director/supervising producer Martin Wood and actress Amanda Tapping; commentary on "Missing" by co-executive producer/writer Carl Binder and director Andy Mikita; commentary on "The seer" by producer/writer Alan McCullough and director Andy Mikita; "The doctor is in: the return of Paul McGillion" featurette; "Stargate Atlantis" bloopers; photo & design galleries ; Disc 3: Commentary on "Miller's Crossing" by co-executive producer/writer Martin Gero and director Andy Mikita; commentary on "This mortal coil" by executive producer Joseph Mallozzi and director William Waring; commentary on "Be all my sins remember'd" by co-executive producer/writer Martin Gero and director Andy Mikita; commentary on "Spoils of war" by producer/writer Alan McCullough and director William Waring; "Mission directive: 'This mortal coil' with Will Waring" featurette; photo & design galleries ; Disc 4: Commentary on "Quarantine" by director/supervising producer Martin Wood and actress Amanda Tapping; commentary on "Harmony" by co-executive producer/writer Martin Gero and director William Waring; commentary on "Outcast" by producer/writer Alan McCullough and director Andy Mikita; commentary on "Trio" by co-executive producer/writer Martin Gero, director/supervising producer Martin Wood and actress Amanda Tapping; "Mission directive: 'Quarantine' with Martin Wood" featurette; "Mission directive: 'Outcast' with Andy Mikita" featurette; "The making of 'Trio'" featurette; photo & design galleries ; Disc 5: Commentary on "The kindred" by executive producer Joseph Mallozzi and director Peter F. Woeste; commentary on "The kindred, part II" by producer/writer Alan McCullough and director/supervising producer Martin Wood; commentary on "The last man" by executive producer Paul Mullie and director/supervising producer Martin Wood; "A look back at season 4" featurette; deleted scenes; photo & design galleries.

Disc 1 (Episodes 1-4): Adrift -- Lifeline -- Reunion -- Doppelganger. Disc 2 (Episodes 5-8): Travelers -- Tabula rasa -- Missing -- Seer. Disc 3 (Episodes 9-12): Miller's Crossing -- This mortal coil -- Be all my sins remember'd -- Spoils of war. Disc 4 (Episodes 13-16): Quarantine -- Harmony -- Outcast -- Trio. Disc 5 (Episodes 17-20): Midway -- Kindred -- Kindred, part II -- Last man.

Joe Flanigan, David Hewlett, Rachel Luttrell, Jason Momoa, Amanda Tapping.

Originally broadcast on the SciFi Channel from Sept. 28, 2007-Mar. 7, 2008.

Colonel Samantha Carter 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.

DVD, region 1, widescreen (1.78:1) presentation; Dolby Digital 5.1 surround, dual layer, NTSC.

These discs are copy protected.

English dialogue, English, Spanish or French subtitles.

Closed-captioned for the hearing impaired.