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- Writers: Brian K. Vaughan
- Stars: Mike Vogel, Rachelle Lefevre, Alexander Koch, Colin Ford,
With the portal to get out of the dome now gone - as is the egg - the residents of Chester's Mills face having to deal with frigid temperatures. The clinic has been damaged so all of the sick and those needing shelter move into the school. Meanwhile, Julia has a serious accident and Barbie refuses to leave her behind in the freezing cold. Lyle suddenly reappears. In Zenith, the egg is found in the same park where Barbie and the others arrived when traveling through the portal. Attempts to touch it are having a serious effect on Melanie. Soon, everyone is in danger from the dome.