2. Episode 2

At the foot of Mount Everest, a climber comes into the basecamp clinic at death's door. Can the doctors save his life and fly him out? As the Everest summit season gets underway, climbers are exposed to a lethal range of high-altitude illnesses, trauma and frostbite, and the world's highest clinic gets busier and busier.

3. Episode 3

At the world's highest hospital at Everest Basecamp, volunteer doctors treat the first major frostbite case of the season, and UK scouts head for summit glory. Perched in a tent on the Khumbu Glacier, the basecamp clinic is the frontline of high-altitude medicine where doctors battle to save the lives of climbers who run into trouble in the death zone.

4. Episode 4

At Everest Base Camp, a UK scout pays a painful price for reaching the top, and three climbers set off for a record-breaking second summit in seven days. With base camp melting and the monsoon approaching, is there still time to risk a final push to the top?

5. Episode 5