Coming Down the Mountain is a 2007 British television film which was shown on BBC One, written by Mark Haddon (author of The Curious Incident of the Dog in the Night-Time) and directed by Julie Anne Robinson.
David resents the protective attention his parents lavish on his younger brother and how much they rely on him to look after Ben.
The family move from London to Derbyshire so that Ben can attend a special school, meaning David has to leave his friends and girlfriend, Gail, behind.
Climbing the mountain, David plans to murder Ben by pushing him off a high ridge.
He becomes the stronger character and, after an evening talking round the camp fire, David sees the real Ben for the first time and the brothers become reconciled.