Just watched this. I know that they have to pick which bits that they want to show, but on her grandmother's death notice there was mention that her father had a half-brother. This was never mentioned in the programme.
Also her grandmother had a sister. Again, she was never mentioned either.
It means that Christina's dad could have half nieces and nephews and full cousins that we never investigated. Surely these family members could help fill in the blanks in the Applegate family history?