Entering the Tardis: Genealogy Block Party!

Elizabeth O'Neal at "Little Bytes of Life" has started something that should have a great future: The Genealogy Block Party. She sets up a situation, and bloggers jump in and write about it. This is my kind of fun, so I'm participating. (Good thing I discovered it, because the deadline is midnight tonight!) So here's the situation: **************** You and The Doctor (of Doctor Who fame) have just finished saving the Earth from nasty, alien monsters. As your reward, The Doctor has offered to take you for a ride in his TARDIS to meet one of your ancestors! Who is the ancestor you will meet? What question(s) do you need him/her to answer? Is there a problem you can help your ancestor solve? Will you reveal your true identity to your ancestor? If so, how will your visit impact the future? (Remember what happened to Rose when she went back to meet her father.) Will you bring your ancestor to the future to meet his/her descendants? What will be the o