"Dawn of the ED - Part Two" is the 688th episode of Casualty and the second episode of the 24th series. It was second of two parts, following "Dawn of the ED - Part One". It was followed by "And Then There Were Three". This episode was directed by Paul Murphy and written by Daisy Coulam.
As members of the group trapped in the shopping centre start to regain consciousness, Jeff and Polly lead them to safety. However, Adam is worried when he can't find Heather and insists on staying behind to search for her. He eventually frees Heather from some rubble but soon realises that he, Ella and Heather are trapped; he doesn't know the way out.
Jeff and Lee slip back into the building, without Dixie and Polly noticing. Jeff wants to rescue the remaining three. Lee has been injured during their escape, though, leaving Adam, Heather and Ella to tend to him while Jeff tries to find help. Jeff, however, collapses on his way out. When no help comes Lee realises that their only chance is to try to climb up the lift shaft to safety. A petrified Heather, though, is too slow, and Adam can only dive for cover when flames engulf her...
Back at the Emergency Department, Jessica is fraught when she realises Adam is trapped inside and sets about organising the F2s, who are overwhelmed by the volume of casualties.
As Adam arrives back at the ED he is inconsolable; it's his first day as clinical lead and he feels as if he has failed at the first hurdle.