The team discovers a young Wraith girl who has been raised by a human, and is in hiding from the people of her human village in fear of her life.

SG-1 investigates when evidence suggests that there are still Goa’uld hiding on Earth — including a former System Lord. Tensions between Earth and the Free Jaffa continue to mount.

Adama heads to Kobol to find Roslin, reassembles the fleet and heads down to Kobol himself to find the presidential party in search of the « Tomb of Athena » which allegedly leads to Earth. Apollo hangs out with Starbuck , Zarek tries to keep his cronie off plotting with Boomer who is unaware of tension building between Helo and Tyrol.

When Tommy, Johnny, and Mickey confront Father Murphy it results in tragedy. Sheila needs Tommy’s help with a domestic issue. Jerry decides it’s time to get a nurse to care for Jeanie. Lou offers to help Candy out with her situation. And Laura discovers the truth behind Franco’s poetry.

The authorities led by Dennis Hyland wants to quarantine every 4400, as several of them are sick with the same as Maia. Hunted by bad conscience Kyle somehow contacts Marsden’s girlfriend.

McKay puts the team at risk when he tries to perfect unfinished Ancient technology that wiped out a civilization. Ronon Dex discovers that he is not the lone survivor from his world.

Samantha Carter returns to Stargate Command when the Ori seize control of a planet, using an expanding force field to gain a foothold in our galaxy.

President Roslin’s fragile coalition is put to the test in the first part of a two-part story. Apollo, who has sided with Roslin, runs into a conflict with Zarek and his accomplice Meier.

Tommy starts taking Janet’s antidepressants. When Sean meddles in Franco and Laura’s troubled relationship he makes things worse. After a gay visitor, the crew wonders about Mike’s sexuality.

On John Colliers’ birthday NTAC receives threatening e-mails and gets attacked by terror. Kyle is concerned that an innocent will be convicted for killing Collier. Maia gets a mysterious infection and is treated at NTAC. Isabelle has broken off her special communication with her mother and transfers it to her father. At school a girl is very interested in Kyle.