Volume 1. Disc 1 (Episodes 1-4): The siege, part 3 ; The intruder ; Runner ; Duet Disc 2 (Episodes 5-8): Condemned ; Trinity ; Instinct ; Conversion

Volume 2, Disc 3 (Episodes 9-12): Aurora ; The lost boys ; The hive ; Epiphany Disc 4 (Episodes 13-16): Critical mass ; Grace under pressure ; The tower ; The long goodbye

Volume 3. Disc 5 (Episodes 17-20): Coup d'etat ; Michael ; Inferno ; Allies.