Palmer and Sherry clash over the handling of the evidence against Carl.
Kim finds herself in a sticky situation with Dan’s brother.
Jack poses as Alexis and meets with a stranger who has vital information, but an agent with a grudge from Jack’s past picks a bad time to get even.
Teri and Dr. Phil return to the Bauer home, putting themselves in further danger.
Dr. Jackson’s undercover mission to a Goa’uld summit is complicated by the arrival of a surprise guest. The rest of the team face a full-scale invasion of the Tok’ra homeworld.
Teri is struck with amnesia and must turn to an old friend for help.
Kim goes to Rick’s house in hopes of finding a lead.
Jack sets Elizabeth up for a sting against Alexis, but she pulls a fast one at the last second.
The Tok’ra war with the Goa’uld escalates, and the rebel faction sends Daniel Jackson to a secret meeting between the System Lords.
Keith takes matters into his own hands when he arranges a secret meeting with Carl. Elizabeth realizes who Alexis really is and immediately comes forward. Jack and Mason question her and then convince her to aid in his capture. The safe house is attacked, but Teri and Kim manage to escape. They are then separated by an unforeseen accident.
Disaster strikes the Stargate, trapping Teal’c in transit. SG-1 must turn to Russia — and to their enemies — for help.
Jack and Palmer finally meet face to face and learn of their connection through Operation Nightfall. They work together to track down those who are seeking revenge on them.
A member of Palmer’s staff has a romantic encounter with the would-be assassin.
Teri and Nina have a revealing conversation about Jack at the safehouse.
SG-1 trains a team of raw cadets, and Colonel O’Neill is forced to take them into a real-life battle situation when he learns of a possible alien incursion at the SGC.
Jack is forced to leave his family when Green places him under arrest and holds him at CTU. Once there, Jack must explain his actions to District Director Ryan Chappelle.
Nina accompanies Teri and Kim to a clinic, where they are given a medical examination. Nina becomes suspicious of a phony FBI agent and decides to move the women to a safehouse.
Palmer goes to CTU and demands a meeting with Jack.
Jack plays a deadly game of cat and mouse with Gaines that results in a final confrontation. CTU arrives on the scene and flies Jack and his family to safety.
Palmer plans to talk to the D.A. about Ferragamo’s murder, but a threat from Carl changes his mind.
Nina discovers that a second assassin has arrived in LA, which means that Palmer’s life is still in danger.