The death toll Under the Dome continues to increase.
Each day (episode) since the Dome formed over Chester's Mill,, the town has lost one resident. The killing was either by the Dome itself, another resident or someone who used the Dome as a murder weapon.
In "Imperfect Circles," that pattern changed with four presumed deaths (Could Norrie's plea to save Alice be answered?): the Dundee brothers, Boomer and Alice. Also, a baby was born.