The Flying Doctors (1986)

Season 3: Episode 26

A man named Harry has inherited a kidneydisease from his father and needs a new kidney. The only one who might be able to give it to him is his brother Johnnie, but he disappeared in Vietnam during the war. Harry's father dies and at the funural his wife Julia sees Johnnie, but Harry doesn't her. When Johnnie ends up in hospital, it turns out Julia was right, it is Johnnie! He gives his kidney to Harry!