Schizophrenic Graham, 75, is brought to King's College Hospital after being stabbed in the neck by a stranger on his doorstep, and needs a CT scan to reveal the extent of his wound. Former nursery nurse Pat, 89, also arrives on the ward, having been found at the bottom of the stairs at home with no recollection of how she got there, while palliative care nurse Tracey treats 72-year-old retired postman Michael, who was recently diagnosed with lung cancer