- The authorities led by Dennis Ryland wants to quarantine every 4400, as several of them are sick with the same as Maia. Haunted by bad conscience, Kyle contacts Marsden's girlfriend.
- A mysterious illness that robs the 4400 of their abilities while also making them deathly ill begins to manifest. As the illness begins to spread, the government orders NTAC, temporarily being headed up by Dennis Ryland once again, to round up all 4400 and place them back in quarantine. As the situation quickly escalates to a possible confrontation, Tom and Diana race to find a cure. Meanwhile, plagued by a guilty conscience, Kyle makes contact with the family of Jordan Collier's alleged killer.—nlghtcreature22-33-793191
- When 4400s become ill with the same harsh and seemingly unfounded symptoms, NTAC issues a warrant to quarantine those afflicted. In an effort to avoid the confinement of the quarantine they were kept in when they first returned in August 2004, the 4400 Center establishes a safe house for its members. As the 4400s in hiding plot their next move, Agents Baldwin and Skouris race to find a cure for the infirmed - and discover a shocking secret in the process.
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