The Enemy (S03E09)

Charles, Jenny, Hubert, Frank, and Alec reach a settlement established around a defunct coal mine. The leader, Leonard Woollen, is eager to revive the mining operations and seeks assistance from Alec and Charles. However, another resident, Sam Mead (Robert Gillespie), strongly opposes this plan, worried it could lead them back to the dark times before 'the death.' Meanwhile, Jenny's feelings for the missing Greg grow more intense, and Charles inadvertently pushes her buttons concerning Alec, escalating the tension.