Horizon 1987 Episode 23 Janice's Choice ( Air Date 1987-06-29 ) Genre Documentary category. Overview "Janice Blenkharn's mother died of Huntington's Chorea, which any child of a victim has a 50-50 chance of inheriting. Janice is faced with the choice of having a test, developed after research in South America, to see if she has this incurable genetic disease.".