The work of NHS emergency response teams. Staff are scrambled to a block of flats after an explosion causes multiple casualties and a driver is trapped after his lorry hits a tree.

Team leader Rochers races to save the life of a DIY mechanic trapped under his car after a jack collapses. A waste disposal plant catches fire, spewing poisonous smoke into the air over a housing estate. A sunbathing teenager plunges off a 40ft cliff, and a dispute on a building site ends with a pick-axe embedded in the bonnet of a brand new Range Rover.

The HART medics race to respond to a major chemical leak which is endangering the lives of thousands of people. There’s a dramatic emergency at an abandoned school after a teenager falls 30ft down the chimney into an underground boiler room. In Leeds, an elderly motorist is run over by his own car and the HART medics fight to free his leg after it becomes trapped around the front wheel.

A man is shot outside a mosque and paramedics Manny and Tony lead the race to save his life. It’s bonfire night and police come under attack in the inner city and HART must brave fireworks and bricks to reach an injured cop. Paramedic Rochers leads his squad on a long-distance drive to Hull where a man is hurling slates from a three storey building onto police below. Elsewhere, a nurse is trapped upside down in her wrecked car and paramedic Andy must climb in to treat her as firefighters struggle to free his patient without worsening her injuries.

The HART team are called to join the operation to defuse a bomb found in a house in Wakefield as disposal officers from the Army try to make a safe a lethal IED. In woods near Leeds, there’s a tricky rescue after a BMX rider fractures his spine. There’s a manhunt on the banks of a river in Leeds for a man armed with a knife. In Halifax, a teenager’s arm is impaled on a gate, sparking a complex operation to free him.

There is a suspected acid attack on the streets of Bradford.

A police chase ends with a spectacular crash and five trapped teens in the wreckage.

The team race to save a critically injured woman, trapped in the wreckage of a van that’s been crushed between two lorries on the M18. A riverside barbecue turns into a tricky rescue operation when one of the guests falls into the water – and another follows him with painful consequences. Former Canadian cop Flash is called to a drink driver who has overturned her car and the team ready their breathing apparatus sets after a derelict school catches fire and they are called to back up firefighters braving collapsing floors in the smoke-filled interior. A teenage girl is stuck at the bottom of a roadside ravine and HART is called to haul her to safety using ropes and there’s a bizarre 999 from the driver of a refrigerated lorry who’s found a party of chilly asylum seekers in the back of his truck. Meanwhile, a disabled man is badly hurt after his adapted people carrier overturns and a horse rider’s fall on a remote bridleway creates a challenge for her rescuers.

Featuring a stand-off involving a man wielding a samurai sword in South Yorkshire.

The team are called to treat one of their own after a freak accident involving an out-of-control 4x4 leaves an off duty medic with serious injuries. On the A1 motorway, there’s a multiple pile up and HART must deal with several casualties as police launched a hunt for the motorist whose driving caused the crash. Mountain biking fanatic Gemma calls in the all-terrain Polaris to help rescue a fellow cyclist. The team are called to provide the muscle for a weighty patient with a hip injury trapped in their home and there’s a dash to save the occupant of an overturned car.

A massive explosion demolishes a block of flats and the team are called to treat the victims. A couple’s lives are in danger after they are marooned on an island in a swollen river – and their rescuers must launch a difficult rescue operation to save them. There’s a complicated rescue and the team struggle to communicate with a motorist trapped in the back seat of his car after a crash on a busy commuter route into Leeds The team are in danger after a suspected bomb is found on a supermarket shelf and a DIY enthusiast plunges through a hole in the floor after a house restoration goes disastrously wrong.

The response team race to the rescue of a worker trapped in a collapsed trench, and paramedic Kim must risk her own life to give him medical treatment 10ft underground.

A truck driver is trapped in his crushed cab after a motorway smash, while in Hull, firefighters handcuff a man to the rails of the Humber Bridge to stop him from jumping.

A woman fights for her life after being knifed by her former partner, while a teenager on her way to seeing two YouTube stars in a live appearance is felled by a falling tree.

Paramedic Kim climbs into a crushed car balanced over a fast flowing river, while services across the Pennines are paralysed when a man plunges from a bridge onto a busy rail line.

A teenager is found with multiple stab wounds in the street near his home, an amateur tree surgeon is badly hurt when a branch falls on his leg and two schoolgirls are run over.

The team treat a lorry driver trapped behind his twisted steering wheel and help is urgently required for a 12 year old who appears to be drunk after drinking an unknown substance.

The discovery of underware one canal bank sparks a risky missing persons search and a police incident ends in a fleeing car passenger jumping over a wall and breaking his leg.

A major fire breaks out in a haulage depot in Brighhouse and a serious accident at an illegal off-road biking site leads to a rider needing urgent hospital treatment.

A skier falls over on a steep slope and suffers s suspected brain injury in Wakefield and a DIY enthusiast's sttempts to fix the heating in his chilly home end in disaster.

The start of the new school term leads of a spate of stabbings and a forester is badly injured in an accident involving a chainsaw deep in woods near Keighley.

The team joins the search for a missing aeroplane pilot and passenger. A man digging for antique bottles in a South Yorkshire tip is buried alive, leading to a desperate fight to save him.

A student climber plunges from a cliff face in Wharfedale and the team fears he has broken his neck. The medics are also called to treat the victim of a stabbing at a meat plant.

The medics spring into action when a cyclist plunges down a cliff in a freak accident. A homeowner's booby trap, designed to deter burglars, sparks a major rescue operation.

A landslip at a construction site traps a worker under tons of earth. Reports of a riot at a school come in and medic Alex must lead the operation to treat the injured.