Highlights from the Fourth Episode of Season 2 of Under The Dome

As conditions in Chester's Mill worsen, Big Jim (Dean Norris ) and Rebecca consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim and Rebecca (Karla Crome) consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim and Rebecca consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Also pictured (L-R) Rachelle Lefevre as Julia Shumway and Eddie Cahill as Sam Verdreaux Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim and Rebecca consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Also pictured (L-R) Rachelle Lefevre as Julia Shumway and Eddie Cahill as Sam Verdreaux Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim (Dean Norris ) and Rebecca (Karla Crome) consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim and Rebecca consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Pictured (L-R) Colin Ford as Joe McAlister, Grace Victoria Cox as Melanie Cross and Mike Vogel as Dale --Barbie-- Barbara Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim and Rebecca consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Pictured (L-R) Colin Ford as Joe McAlister, Grace Victoria Cox as Melanie Cross and Mike Vogel as Dale --Barbie-- Barbara Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim and Rebecca consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Pictured Grace Victoria Cox as Melanie Cross Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim and Rebecca consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Pictured Mike Vogel as Dale --Barbie-- Barbara Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.

As conditions in Chester's Mill worsen, Big Jim and Rebecca consider resorting to the extreme measure of population control, which drives a wedge between Barbie and Julia. Meanwhile, clues to Melanie's past and her connection to the Dome are revealed, on UNDER THE DOME. Also pictured Eddie Cahill as Sam Verdreaux Photo: Brownie Harris/CBS2014 CBS Broadcasting Inc. All Rights Reserved.