: Locked in McKay’s personal lab. They discover the city has malfunctioned and is broadcasting a distress beacon that could reveal Atlantis's location to the Wraith.

: Stuck in the infirmary. Ronon injures himself further by trying to pry open the doors with an IV pole, leading to a tense bonding moment as Keller treats him. The Climax & Resolution

: The team eventually learns there is no real contagion; the quarantine was a system malfunction caused by an atmospheric anomaly.

[s4e13] Quarantine -

: Locked in McKay’s personal lab. They discover the city has malfunctioned and is broadcasting a distress beacon that could reveal Atlantis's location to the Wraith.

: Stuck in the infirmary. Ronon injures himself further by trying to pry open the doors with an IV pole, leading to a tense bonding moment as Keller treats him. The Climax & Resolution [S4E13] Quarantine

: The team eventually learns there is no real contagion; the quarantine was a system malfunction caused by an atmospheric anomaly. : Locked in McKay’s personal lab