 In 1979, Pam is told by Digger's doctor that Digger was a carrier of neurofibromatosis, and that she and Cliff, as his children, were carriers; as neurofibromatosis is a potentially fatal disease to infants.Ironically, Pam soon discovers she is pregnant again.As before, however, tragedy strikes as a rattlesnake frightens Pam's horse when she is out riding and throws her, causing a second miscarriage.