: Barbie tracks down his estranged father, Don Barbara. While initially a reunion, it’s revealed that Don has deep connections to Aktaion Energy—the corporation seemingly tied to the Dome’s origin.

In the pivotal seventh episode of Under the Dome 's second season, the boundaries of Chester’s Mill finally break—at least for Barbie. This installment, titled " Going Home ," delivers a massive shift in the show's mythology by taking us beyond the wall and into the high-tech, corporate-shadowed world of Zenith. Key Plot Highlights

"Going Home" is often cited as a turning point for the series. By expanding the scope to include the outside world and the Aktaion Energy conspiracy, the show moved away from being a simple survival story into a complex sci-fi thriller. It answered the burning question of "What’s outside?" while simultaneously raising a dozen more about Barbie’s past and the Dome’s true purpose.

: For the first time, we see the world outside the Dome. Zenith is a stark contrast to the rustic, trapped feel of Chester’s Mill. It’s a place of memories for Barbie, but also of danger, as he quickly realizes he's being tracked by mysterious operatives.

: Barbie’s father possesses a "Red Door" on his property that seems to be a gateway or significant landmark related to the tunnel system.

: After descending into the mysterious tunnel found beneath the high school, Barbie makes the ultimate gamble. He lets go of the cliffside, falling into what he expects to be certain death, only to wake up in a playground in his hometown, Zenith.

: Back inside the Dome, Julia and the others are desperate for a sign that Barbie survived. In a touching moment, Barbie manages to send a signal through the impenetrable wall, proving there is a way out (even if it’s a one-way trip for now). Major Revelations