EPISODES 1-4:

ADRIFT: In 28 hours, Atlantis’ shields will fail completely and the city's inhabitants will succumb to the vacuum of space. To add to the predicament, an asteroid belt is fast approaching!

LIFELINE: Sheppard and his team are trapped by a Replicator sub-routine while on a daring raid to secure a desperately needed ZPM deep inside Replicator territory.

REUNION: As Atlantis’ new leader, Sam must execute new security protocols that leave Ronon feeling alienated and considering leaving Atlantis for good.

DOPPELGANGER: A malevolent alien entity Sheppard began hosting, after exposure to a crystalline growth on a jungle planet, is wreaking havoc on Atlantis.