Max is reunited with James, and old friend from medical school, who enters the ED with his fiancee Aisha after she falls victim to a seemingly spontaneous acid attack. The encounter also gives him cause to re-evaluate his relationship with his estranged wife Zoe, who has arrived at the hospital seeking a reconciliation. Meanwhile, Elle reveals she wants to tell Blake that Jacob is his father, and when the lad is admitted to the department with a compass stuck through his hand, now seems as good a time as any