Ambulance: Code Red

42-year-old Adam has a broken leg after a fall at work; 22-year-old Luke has a potentially life-threatening irregular heartbeat, and a young child stops breathing after a seizure.

Critical care teams race to save lives as a 61-year-old is injured in a motorcycle crash, a new mum haemorrhages days after giving birth, and a 12-year-old suffers severe leg injuries.

A man suffers repeated cardiac arrests as medics fight to save him, while paramedics rush to treat another man severely burned by a gas canister explosion on a bonfire. (S4 Ep3)