Britain's air ambulance teams race to bring the hospital emergency department to where it's urgently needed. Mick is put into an induced coma after suffering a cardiac arrest on the tennis court. Fell-runner Michael is seriously injured by cows in Cumbria. And helicopter medics face danger as they treat Adrian, who's been crushed by a collapsed wall.

Steph is trapped with multiple injuries after a bad smash near Alnwick in Northumberland. An accident with a bonfire leaves Paul with serious burns. And in Thetford Forest in Norfolk, it's difficult for the medics to reach horse-rider Alice, who has badly broken her ankle.