Nash's continued medical non-compliance causes him to spiral dangerously out of control, straining his own sanity and the well-being of his patients.

The onset of schizophrenia in a young boy causes heartache and soul-searching for the boy's parents, while Kate realises that she is missing Nash who is in recovery.

A distressed schoolgirl with an awful secret causes anxious moments for the staff of Muirpark Hospital, and exam pressure forces Kate and Shug to breaking point.