Cullen faces every parent's nightmare as a six-year-old child is hit by a car. Simon and Michaela battle to help a man whose pacemaker is misfiring, sending agonising shocks through his system. Tanie and Marlie fear for their safety.

A 76-year-old motorbike rider suffers horrific injuries after catapulting into trees. Al and Cam race to a lung cancer survivor gasping for air. Mike joins the 'fun' ambulance to help seriously ill children escape from their daily challenges.