 When delusional Cathy is found, she has no memory of taking the infant Kevin or where she had left him.By 1977, the loss of their son had taken its toll on Joe and Viki's marriage, but when Cathy finally remembers enough for Kevin to be found, Joe and Viki reconcile.Joe died of a brain tumor right before Kevin's brother, Joseph Francis Riley, Jr., is born on-screen in January 1980.