The Flying Doctors - Season 3 Episode 17 Wedlock

A boy finds out his mother is having an affair with another landowner. The boy falls off his horse and complains of pain in his legs. chris can find nothing wrong with the boy and suggests he go home. He hears his parents talking of divorce and falls ill again. Sam and Chris devise a way to find out if he is faking or not. Marty is forever talking about leaving for Surfer's Paradise so DJ, Constable O'Connor and Sam set up the Surfer's Carnival.