London's frontline trauma hospitals treat the most critically injured patients across the busiest month of the year, including a night of violence as stab victims flood the wards, and Peter, who has been crushed under a 400kg crate at work.

An ex-Royal Marine requires surgery using screws, plates and rods to connect his skull to his neck. At St Mary's, bike crash victim Danilo has a ruptured aorta and a shattered pelvis.

Frazer has major spinal injuries after falling off a cliff. Lily's still in a coma as she goes in for urgent hip surgery, and a toddler has brain scans after a TV fell on their head.

An 18-year-old crashes his moped and needs multiple surgeries to rebuild his leg. Danilo finally heads home after life-saving treatment, and pays tribute to 'the heroes' who saved him.

The air ambulance, paramedics and fire crews are dispatched to a pedestrian who's trapped under a lorry in south London. A 13-year-old has crashed an e-scooter into a lamppost. And after breaking his femur, an 84-year-old is facing complex surgery.

Zoltan arrives at St Mary's Hospital after being hit by a van. The 33-year-old was crushed against metal railings and then thrown into a basement. And after a collision on the M25, Karl urgently needs a blood transfusion.