Geoff has been struck with excruciating head pain that left him semi-conscious, Stephen has suffered a potentially lethal stroke, and Adam is flown in by air ambulance after being involved in a car crash. In every case, the speed of the decisions made and the treatments that follow are vital.

Kieran is flown in from a road accident with multiple injuries and two ruptured arteries. Gary has a torn aorta and requires urgent but dangerous surgery. Roy needs emergency surgery to remove a blood clot in his neck. Jonty has numerous broken bones and possibly serious internal bleeding after falling through a skylight.

David has been attacked with a machete, Richard's chest pains are not indigestion, Neil has come off his motorbike at 100mph, and Jack fell a substantial height onto his head. The hospital staff have seconds to decide on life-saving surgery.