Jason Willinger

The training and the acclimatisation climbs are over; the expedition leaves Base Camp heading for the summit. David Tait and Phurba Tashi are within hours of the summit, but even if they make it, they're only a quarter of the way through their challenge.

The hazards of climbing become perilously, vividly real during Team Two's difficult attempt on the summit, particularly when two of the climbers ignore the instructions of their seasoned guide and put multiple lives at risk.

Everest gives up it's first summit of the season, and takes its first victim.

As the members of Russell Brice's 2006 Everest expedition continue to adjust to the unforgiving extremes of the mountain climate, their leader spots a narrow window of opportunity for an early attempt on the summit.

The climbers face their first big test when they must reach a high camp by the deadline fixed by expedition leader Russell Brice. The climb is especially hard on Betsy, whose inexperience is threatening her summit dreams.

After a knee injury ended his football career, John Golden overcomes a disability to attempt the highest goal on earth.

Expedition leader Russell Brice is back on Everest for the 2007 climbing season with a team of new climbers -- and some familiar faces. After the Sherpas summit, two climbers summit hours after the Sherpas and begin a dangerous descent.

Astronaut Scott Parazynski attempts to be the first spacewalker on the summit of Everest.

The members of Brice's expedition are split into two teams as they prepare for their perilous trek to the summit. Among their number is a firefighter who longs to plant a flag in honor of those who gave their lives on Sept. 11. Will Everest let him?

One day after Team One's departure for the summit, it's Team Two's turn to leave for their summit attempt. Mogens Jensen is still determined to summit without oxygen after three unsuccessful attempts, and he leaves Advanced Base Camp.

Rising more than 29, 000 feet above sea level, Everest is the highest peak in the world, and every year hundreds attempt its summit. In this episode, the members of one such expedition acclimate themselves to the harsh, uncompromising mountain.

Russell gives Team One a final talk before their summit attempt. After reaching the summit for a first time, David Tait and Phurba Tashi are descending on the south side -- out of radio contact.