The Doctor has devised a two-pronged assault--he, Taron, and Codal will go in the front door in the Spiridon disguises, accompanied by Rebec in the Dalek shell, and try to find their way to the cooling chamber. Meanwhile, Joe and Latep will go in through the ice tunnels and attempt to rendezvous with them. Meanwhile, Wester enters the base on the pretext of sharing information on the whereabouts of the Thals, and is shown to the control room. There, he realizes the Daleks' preparations are incomplete, and opens the bacteria chamber, which kills him instantly. The control room goes into automatic lockdown, sealing two Daleks inside forever, and foiling their plans for the bacteria.