agg age ▁home ▁with ▁her ▁as ▁she ▁learned ▁lines . ▁ ▁M ental ▁health ▁ ▁Series ▁producer ▁Jane ▁Wall bank ▁confirmed ▁in ▁August ▁ 2 0 1 9 ▁that ▁Jac ▁would ▁be ▁the ▁focus ▁on ▁a ▁new ▁story ▁about ▁mental ▁health . ▁She ▁explained ▁that ▁Jac ' s ▁work ▁and ▁home ▁lives ▁would ▁place ▁her ▁under ▁pressure , ▁leading ▁her ▁to ▁struggle , ▁especially ▁as ▁she ▁tries ▁to ▁prior it ise ▁Emma . ▁The ▁story ▁coinc ides ▁with ▁the ▁guest ▁returns ▁of ▁Joseph ▁and ▁Elli ot . ▁Wall bank ▁told ▁D ain ty ▁( Digital ▁Sp y ) ▁that ▁she ▁wanted ▁their ▁returns ▁to ▁impact ▁Jac ' s ▁story . ▁Joseph ▁returns ▁at ▁a ▁point ▁when ▁Jac ▁begins ▁to ▁struggle ▁and ▁Elli ot ' s ▁return ▁occurs ▁as ▁the ▁plot ▁clim ax es . ▁She ▁also ▁pra ised ▁Marcel ' s ▁performances ▁as ▁Jac ▁as ▁" heart ▁w rench ing ", ▁and ▁confirmed ▁that ▁the ▁story ▁would ▁feature ▁on - location ▁scenes . ▁ ▁Other ▁appearances ▁ ▁Al ong side ▁her ▁appearances ▁in ▁Hol by ▁City , ▁Marcel ▁has ▁played ▁Jac ▁in ▁the ▁show ' s ▁sister ▁shows , ▁Hol by Blue ▁and ▁Cas ual ty . ▁Jac ▁appears ▁in ▁the ▁opening ▁episode ▁of ▁Hol by Blue ▁second ▁series , ▁first ▁broadcast ▁in ▁ 2 0 0 8 . ▁Marcel ▁first ▁appears ▁in ▁Cas ual ty ▁for ▁one ▁episode , ▁originally ▁a ired ▁in ▁February ▁ 2 0 1 6 , ▁during ▁its ▁thirty ▁series ▁to ▁co inci de ▁with ▁the ▁appearance ▁of