Australia's ambulance crews fight to save lives in a race against time. Every second counts as Taz and rookie Amanda treat a swimmer who collapses after leaving a sauna - they must act quickly to prevent a cardiac arrest. Jamie and Mike deliver friendly first-aid to a colourful character having a tough time. Natalie and Leonard find a novel way to lift an elderly patient's spirits. Matt and his helicopter crew take flight to help a two-year-old girl who's fallen unconscious and stopped breathing.

Mark and Carina race to help a critically injured paraglider who's crashed into a cliff, but challenging terrain hinders progress as night closes in. Jamie and Mike struggle to convince a cyclist hit by a car to go to hospital, fearing her adrenaline is masking multiple injuries. A bed bugs case has Nicola and Michelle getting itchy all over, while Taz and Amanda rush to aid a man who's collapsed in agony at his workplace.

A severe asthma attack has Mark and Carina battling to save a young woman struggling to breathe. Nat and Leonard rush to aid an elderly man who's convinced his chest pain is a heart attack, just like the one which claimed his dad's life. But are his symptoms masking another injury? Taz and Amanda find a fun way of deciding who gets to drive the ambulance for the day. Matt and his helicopter crew airlift a trauma patient to hospital after a high impact car crash.

A heartbreaking fall for a 98-year-old who lives alone has Taz and Amanda mounting a delicate rescue mission. Afterwards they are shocked by vicious abuse from the public. Nat and Leonard respond to a suspected drug overdose at a trendy shopping strip. As the pair attempt to treat the young man, they get a surprise when police arrive on the scene. Ray and his air ambulance crew brave sub-zero temperature, poor night visibility and difficult terrain to rescue a badly injured emergency volunteer.

Nat and Leonard battle to keep an 81-year-old woman alive after a suspected stroke. Every second counts as Taz and Amanda race to a child trapped in a car outside a kindergarten, but they struggle to find the location. Ray and the air ambulance crew help a motorcycle accident victim who's shattered knee could cost him his leg. A missing item of clothing has Nicola and Michelle scratching their heads. Mike and Jamie are taken aback by a primary school boy's shocking playground injury.

Matt treats a worker burnt in an explosion, but bad weather jeopardises the flight to hospital. Nicola and Risky race to save an 85-year-old woman struggling to breathe at the wheel of her car. Leonard's love life is brought into the spotlight when Nat and a patient both press him to propose marriage. Mark has to deal with a misbehaving driver who's crashed into a pole. Mike and Jamie aid a motorcycle accident victim more concerned about what his wife will say than his own wellbeing.

Mark is called to a volatile emergency as a young man leaps from a moving car and goes on a rampage, causing mayhem. Ray and the air ambulance crew race to aid a camper stranded on a remote mountain with a broken leg as night closes in. A nurse becomes a patient after a car crash leaves her struggling to breathe. Amanda and Leonard treat a tourist so badly injured in a skateboarding accident that she may not be able to return home.

A critically ill patient phones for help before falling unconscious inside her home, forcing paramedics to attempt a break in. Mark and Carina treat a man with a life-threatening condition, where the only way to save him is to stop his heart. Jamie's good humour is tested by a crying toddler with a nasty case of croup. Nicola and Risky attend an elderly woman suffering a suspected heart attack, who's more concerned about letting her friends down than her own perilous health.

The air ambulance crew rush to a frightened car crash survivor whose memory loss has Matt concerned. Mark must keep his emotions in check as he treats a toddler with severe burns, whilst trying to reassure the distressed parents. A mysterious young woman found unresponsive on a bus has Carina baffled as to what's wrong. Risky and Nicola attempt to help a 60-year-old with a broken wrist, but are confronted by an unwanted intruder who escalates the situation.

Mark races to help a young father of three who's in danger of losing his arm, which got caught in a factory conveyor belt. After a car crash leaves a trail of destruction and several walking wounded, Nat and Leonard are shocked by a patient's surprising revelation. Matt takes charge of a precarious rescue in mountain ranges, where a driver is trapped in his car. Amanda rushes to help a sick baby, but quickly succumbs to his infectious smile.