Ep 3. Lockdown

In the season 8 episode 3 of Stargate SG1 titled "Lockdown", the SG1 team is called to the Homeland Security Complex, where they find themselves trapped inside the building after an alien infiltrator takes control of the security system.

The episode starts with Colonel O'Neill (Richard Dean Anderson) and his team visiting the complex to attend a briefing on a new threat to Earth. However, as soon as they arrive, they sense something is not quite right.

When they try to leave the building, they find that all the exits are locked down and the security system has been taken over by an unknown alien force. As the episode progresses, the team discovers that the alien threat is not just inside the facility but also outside in the form of an alien vessel hovering above the complex.

As they try to find a way out, the team members split into groups to explore the building's different sections. At the same time, Dr. Weir (Jessica Steen) and SG-8 from the SGC try to override the security system from the outside.

In their efforts to escape, the SG1 team confronts various obstacles, including automated defense systems that attack them and sabotage their progress. They also contend with a malevolent force that seems to have taken control of the security system.

The situation turns dire when Teal'c (Christopher Judge) is separated from the team and finds himself trapped in a room with a malfunctioning life support system. His colleagues must race against time to rescue him before his air supply runs out.

Meanwhile, Colonel O'Neill, Samantha Carter (Amanda Tapping), and Daniel Jackson (Michael Shanks) uncover the truth about the alien infiltrator and the reason why the complex was targeted. They ultimately discover that the alien force is after a powerful weapon prototype kept inside the complex.

As the episode builds to its climax, the SG1 team fights to regain control of the security system and prevent the alien force from obtaining the weapon prototype. The action sequences are intense, as the SG1 team members use their impressive skills and training to take on the alien infiltrator and its minions.

Overall, "Lockdown" is a gripping episode that showcases the SG1 team's bravery, ingenuity, and teamwork as they face a formidable and deadly threat. With tight pacing, smart writing, and strong performances from the cast, this episode is a true highlight of the series.