I wrote about her appearance shortly after the show aired. At the end of the article at http://goo.gl/k9uW0s, numerous questions and comments were posted by newsletter readers. In the Tonight Show appearance, Christina answered several of those questions.
Several newsletter readers commented that this episode certainly presented a lot of unasked and unanswered questions. In fact, Christina said that she and her father learned a lot about his mother and her immediate family from the show's producers and professional genealogists but much of that information was left out of the televised program because of time constraints.
For instance, newsletter readers speculated about the fate of the sister of the woman in question. Christina said that she and her father were told all the details about the sister's death from malnutrition while Christina's grandmother died two years later from cirrhosis of the liver. The death from malnutrition was not mentioned on the televised program
Another fact not seen on television was that fact that Christina's great-grandfather murdered his own brother. Obviously, this was a family with "problems."
In short, Christina's appearance on the Tonight Show confirmed what many of us already suspected: the genealogy research is exhaustive and the guest celebrity is given all the information that is found. Almost everything is recorded on videotape. However, only the more interesting bits and pieces are extracted and shown on Who Do You Think You Are?
You probably can soon watch Christina Applegate's appearance on the Tonight Show with Jay Leno on www.Hulu.com. The Tonight Show usually becomes available on Hulu.com the day after the episode is broadcast on NBC. I just checked; as I write these words the program is not yet available but I suspect it will appear soon. Keep an eye on http://www.hulu.com for more information.