Viewers will undoubtedly still be reeling from the emotional conclusion to Casualty’s Learning Curve boxset, which saw Kim Chang (Jasmine Bayes) tragically die from multiple organ failure. However, following confirmation that the latest boxset – entitled Lethal Legacy – would be heading to our screens just one week later, there was little breathing room for the characters to deal with their grief and presumed responsibility for the resident doctor’s death. As fans will recall, Kim’s colleague Matty Linlaker (Aron Julius) found her unconscious at home, having taken a lethal overdose of appetite suppressants and weight loss medication. He also discovered her journal, which detailed every time mentor Stevie Nash (Elinor Lawless) had reprimanded her. He instantly blamed Stevie for what had happened, but it was clear that he was also taking some of the guilt having arrived at Holby City together. In today’s episode, the staff had no time to recover following Kim’s funeral and were thrown into a new dilemma at the ED. Patients were being admitted with a mystery illness, and nobody could …