Thirty-seven-year-old Robert arrives at St Georges Hospital, London after colliding with a car on his motorbike. Scans show he has a bleed on the brain, a broken jaw, and two missing teeth, and he faces potentially life-changing injuries and extensive surgery. Meanwhile, 54-year-old Mary collapsed in the street on the way to work and hit her head. Doctors need to establish whether it is simple fainting, or whether something more sinister is to blame, with tests revealing she will need a pacemaker fitted. Plus, 27-year-old Jessica comes to A&E with a wound that will not heal, after having a lumpectomy to remove breast cancer tissue two months ago.