1.07 Square Pegs by Howard Griffiths
Summary: Chris comes second in a shooting competition. Someone's broken into the Nomad only to steal a particular kind of painkiller. Turns out to be the son of the farmer who won the shooting competition (for the 6th year running), who is depressed because his mother left him and he's not living up to his father's expectations. The boy's good at playing violin, not sheep shearing, but his father won't realise they're two different people. The boy ends up shooting himself in the shoulder by accident. On the outskirts of town, a woman with emphysema has set up camp with her mentally disabled adult son. The son ends up introducing himself to everyone in town, and when his mother dies, he's shipped off to an aunt who can look after him, as he can't look after himself.