Farmer Mark's peaceful countryside existence in Grenfell is being interrupted by constant pain and risk from an aneurysm in his brain. The procedure he'll undergo requires the precision and skill of a fighter pilot, according to his neurosurgeon Dr Wong. Patient Kate wonders whether surgery to investigate a lump in her neck will affect her ability to swallow and speak. In the emergency department, there's a story that's very close to home, as the show's editor, Mike, presents with heart arrhythmia.