Ep 13. Critical Mass

When an experimental naquada-powered generator explodes, Atlantis is put at risk of an overheating core that could potentially destroy the entire city. Our heroes must act fast to find a solution. Dr. McKay leads the charge, trying to minimize the effects of the explosion, but it soon becomes apparent that this is a nuclear-scale disaster, and he's running out of time. Meanwhile, Sheppard and Weir seek help from their Wraith ally Todd, who holds information that could save the city. With the clock ticking down, the team must race against the clock to prevent the unthinkable from happening. Will they be able to avert disaster, or will Atlantis fall to its own power source? Find out in this explosive episode of Stargate Atlantis.