A paramedic discovers that his critically-ill patient is a close friend.
One of the team collapses with a heart attack, and his colleagues fight to save him.
A teenager plunges 30ft from rocks and a boy is hit by a runaway truck.
Helimed 99 is grounded by blizzards - but their patient is suffering a heart attack.
A paraglider crashes to earth and a vintage car enthusiast is runover by his own vehicle.
A woodsman is injured by a falling tree and a factory worker is trapped in machinery.
Two buses collide and the team face a life-or-death battle to save one of the drivers.
A family day out ends in a serious car smash, and two mothers treat four injured children.
Paramedic Darren risks his own safety to reach a walker who has fallen down a ravine.
Firefighters cut apart a supercar, and a family visit to a stately home ends in hospital.
A boy is badly hurt after a freak quarry accident, and a climber falls off a rock face.
A rap artist thrown from a speeding car fights for his life; only Helimed 99 can save him.
The team is forced to ask the RAF to switch off the UK's missile shield.
The team perform a major rescue operation after a people carrier leaves the motorway.
A man cutting logs for his wood-burning stove suffers a fractured skull.
A climber's first ascent in the Derbyshire Peak District ends in a serious fall.
Helimed 99 is the only hope of survival for a critically-injured nine-year-old boy.
A 12-year-old boy fights for his life after his mum's car collides with a bus.
The team fight to save a farm worker's leg after an accident with a combine harvester.
A climber falls from a rockface in the Derbyshire Peak District.
A quad biker falls 60 feet and a teenager is feared paralysed after a scooter accident.
Helimed 99 touches down on the beach after a sun-seeker falls into Whitby Harbour.
The team must save a man suffering from hypothermia after being trapped in a whirlpool.
A nurse becomes a difficult patient and a pensioner's car careers down a hill-side.
Pilot Steve lands in the middle of an army camp after a 10-year-old boy is knocked down.
A village is brought to a standstill by a multiple pile-up, and an unsung hero helps out.
A man severs his hand in an accident with a saw, but the team are determined to save it.
A plane crashes on an airfield and a rocket scientist comes to earth in a bike accident.
Two brothers are hurt in a bike accident high in the Derbyshire Peak District.
Paramedic Sammy recruits an army of tourists to carry an injured patient.
The team prepare for an amputation after a farm worker is trapped by his legs.
A boy is thrown over a garden wall in a freak road accident.
The team are called to an accident involving a bus and a teenage racing driver is injured.
A top jockey is thrown by her horse, and a builder is trapped beneath his dumper truck.
A climber falls and breaks his leg halfway up a cliff face.
The team races to save the life of the hero of a rail disaster.