Ed Leigh travels to Alaska to meet a group of pioneering snowboard film makers as they work on their latest movie.

The team make the most of the stunning scenery, some of the finest backcountry terrain in the world, and use the best riders in the world to capture stunning images on film. The painstaking process means that huge effort is required to capture even the smallest amount of footage.

But filming in such spectacular scenery brings its own challenges and dangers as Ed discovers when a shoot is unexpectedly cut short after a rider's life is put in danger.

Watch Ski Sunday on BBC Two 17:45 GMT on Sunday, 3 February.