When Barbie is apprehended by a group of mysterious men, he is relentlessly interrogated about his connection to the Dome.
When Barbie enlists his father's help to reach out to Julia, he realizes that Don may know more about the Dome than he is letting on. Brett Cullen guest stars.
When Barbie descends into the unknown abyss in the mysterious tunnel to look for Sam, he discovers a world that is familiar but filled with unanswered questions.
When Barbie and Sam set out to investigate a mysterious tunnel, a cave-in severs their path back to Chester's Mill.
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