A patient is re-admitted with heart problem and Whitman is convinced it has to do with the drug trial she's been on. Also, it's exam time for Rob and Polly, however only one of them can get the prestigious Clinical Fellowship. Also, Hurley receives a mystery text message, making him even more paranoid. His mind's not on the job when he fails to recognise the symptoms of a woman with terrible abdomen pain. Later, Harriet turns up at the hospital and tells Hurley he needs to move out for a while.