This episode kicks off during the morning rush hour, meeting workers who set off on their daily commute but find themselves fighting for their lives in the skilful hands of the King's College Hospital A&E team. Two cyclists arrive with serious head injuries. IT analyst Christopher hit a log on his way to work, and concerns are raised when scans show a bleed on his brain. Meanwhile, Brighton cyclist Sarah swerved to avoid a pedestrian when riding at 30mph downhill without a helmet. She's airlifted to King's by HEMS, the helicopter emergency service who deal with some of the most serious trauma cases. Also brought in by helicopter is father-of-four Kevin, who fell from scaffolding while repairing a roof. The next few hours are critical for him. And 80-year-old former docker Bill has hurt his knee while drinking at his local working men's club, but he soon perks up in the company of nurse Laura.