Obtaining a Spectrum Pursuit Vehicle from a trapper, Scarlet and Green speed to the next base, Big Bear, only to learn that Eddie has already passed through and is now on his way to the Frost Line command centre. After knocking out a guard who is barring entry to the base, Green removes Eddie's oxygen-depletion device from the ventilation system before it can affect the air. Meanwhile, Scarlet takes the SPV and chases Eddie. The snowcat is carrying liquid oxygen, which Eddie dumps into Scarlet's path to force him off the road. Scarlet draws his gun and fires several rounds into a snow-covered slope nearby; this triggers an avalanche that pushes the snowcat over a cliff, causing it to explode on the rocks below. With the command centre saved, Ward, no less arrogant than before, radios Cloudbase to make peace with White.