A rider is bucked off her horse and is lying helpless in remote bushland. A risky chopper rescue is her only chance, and Bill desperately tries to save a teacher having a massive heart attack.

Paramedics Laura and Aaron prepare for double the complications when a pregnant mum goes into labour. In a first for the show, cameras follow the patient into hospital not to save a life, but to welcome a new one.

Ben and Mim find a grandfather in agony with horrific burns after spilling a huge pot of boiling water over himself. Lisa's first day back from maternity leave has her examining a tiny baby with a soaring heart rate and high temperature.

Aaron and Laura fear the worst as they rush to a teen victim of a shark bite. Ben and Mim must tackle a footy player who's dislocated his shoulder and super mums, Sally and Olivia race to a terrified one year old with a severed finger.

Every second counts as paramedics rush to help people in crisis. A leaking oxygen bottle blows up in a man's face. Nhi and Carlos fear he could stop breathing at any moment. Bill is on high alert, dealing with a violent knife fight.

Aaron and Laura desperately try to stop blood pouring from a pedestrian's head after he was hit by a car and terrifying seizures threaten to leave a young Mum with brain damage.

Aaron and Laura rush to a young mother who is bleeding heavily from cervical cancer and Lisa is called to a patient whose obsession with chillies now has him in excruciating pain.

Ben and Mim are called to a patient in the final stages of labour. Newly qualified Ben has never delivered a baby and he's hoping this will be his first. A dementia case hits home for Lisa.

A hero bystander uses CPR to bring a woman back from the dead but intensive care paramedic Bill needs to get the grandmother to hospital before she goes back into cardiac arrest.

Paramedics, Sally and Olivia fear the worst for a motorcyclist after an accident and Laura and Aaron are impressed by the courage of a boy who has suffered a fractured leg.