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- Writers: Brian K. Vaughan
- Stars: Mike Vogel, Rachelle Lefevre, Alexander Koch, Colin Ford,
As the temperatures inside the dome return to normal, it continues to retract forcing everyone into the center of the city. Melanie's health continues to deteriorate and it becomes obvious that her condition is directly related to the fate of the egg. Barbie doesn't react well when he learns that Hunter was spying for his father. He gets his father Don the dome's edge, telling him they need the egg to survive. Don agrees but the military intervenes. An attempt to cure Melanie goes horribly wrong.