Lockdown

Lockdown is the third episode of the eighth season of Stargate SG-1.

Plot
Several months after the destruction of Anubis's fleet, Stargate Command gets a new member in form of the Russian Col. Vaselov, who promptly asks General O'Neill for a place in SG-1. After the General rejects this request Vaselov talks with Daniel about this but suddenly collapses. When he wakes up again he doesn't remember anything since he was in Russia and his body shows signs of extensive viral damage. O'Neill orders the base to be shut off but Daniel, who wants to leave on a mission with SG-11, suddenly takes a weapon and injures several people before he is stopped by O'Neill and Teal'c.

Meanwhile Vaselov remembers that he felt like being trapped in his own body and he blames himself for what has happened. It is also found out that a Russian astronaut from the ISS died a week after returning to Russia, exhibiting the same symptoms as Vaselov. Later Daniel wakes up and quickly remembers that he was taken over by Anubis. It turns out that the former System Lord, thanks to his half-ascended form as a dark specter, can jump from person to person. It is concluded that Anubis plans on leaving the base through the Stargate because he can't use his ascended powers, since this would alert the Ancients. In the meantime Anubis easily eludes capture, prompting the SGC to execute a bold plan to stop his endless wave of murders.

This plan involves moving the control room and splitting the base into 3 using drop-down steel doors. The Stargate is in one section, the new control room is in another, and the room which controls the 'lockdown' is in the third. All staff are restricted to 1 section only. No movement between sections is allowed.

However, Anubis takes over Carter (in the section with the room which controls the 'lockdown'), and makes her schedule a program (including the self-destruct of the base) to open the doors temporarily, and she goes into the new control room and begins dialling the gate, but O'Neill tries to stop her. However, O'Neill is taken over and attempts to walk through the gate, but is stopped by the previously possessed Vaselov who came from the infirmary. Anubis possesses him, and walks through the Gate.

Anubis did not escape, though, as Carter changed the address to a freezing planet, and the temperature freezes Vaselov's body (as he is only in a hospital gown), so Anubis cannot re-dial the gate.

Guest stars

 * Aaron Pearl (Major Kearney) previously played the younger version of Hammond in the season two episode 1969.