Station/Agent is case #6 in House M.D. - Critical Cases. John Gardiner, a 36 year old New Jersey Rail builder, was brought to the hospital by his wife Mary after she visited him at work and saw his fingers were turning purple. On admission, his ears were purple as well, and he had tachycardia. After a differential diagnosis, House orders a full battery of tests. The blood analysis shows damage to the blood vessels. After using 1 oxygen mask and 8 digestive meds, they manage to rule out toxemia. John goes code blue and has to be defibrillated.