The Flying Doctors (1986) : 5x3

The Malarvy-family comes to Coopers Crossing when their daughter is hospitalized due to pneumonia. They have eight children and the oldest daugther looks after the rest of them. She meets David and at a party she accidently ""thinks"" David proposed to her. She is really thrilled and tells her parents right away. They also like the idea of their daughter beeing married to a doctor. After a lot of talks, explanations and misunderstanding the girl understands and decides to go to nursing school in Broken Hill.