Lockdown

US Airdate : 23 July 2004

UK Airdate : 19 October 2004

Summary

When Daniel Jackson contracts a mysterious illness from a Russian colonel, O'Neill is convinced that a contagion has infected the base and orders a lockdown.

But when Daniel reveals that he was actually possessed by Anubis, who is now loose on the base, O'Neill must discover the identity of the new host!