The Flying Doctors - Season 2 Episode 2 Horses For Courses

A man called Jim has a car-accident and goes to hospital. His wife, Carol, is acting a bit strange about it. Chris finds out she's dyslectic, but she refuses to admit it. Later her son drinks some medicine, she can't read the bottle and that way everybody finds out she can't read and write over the radio. Sam buys a horse from Carol, who is an extremely good rider, and Sam and Kate are practicing togehter for the big rodeo. Carol doesn't want to ride in the rodeo, she feels embarresed, but she turns out anyway. There's a beer-strike and Hurtle makes some own beer. But suddenly the whole town starts acting really strange. Geoff finds out Hurtle has mixed the alcohol with caffeine, which causes personality changes!