Ghost Light
This is turning out to be quite a good season, too bad the ratings weren't there, I could easily see another season for Sylv..
Back to Ace' beginnings, since she says she was here at 13, I believe her seasons w/ the Doctor are at least 5 in her years, as she looks at least 21or older. She dresses older, acts older, and more intelligent
Another spacecraft in the cellar, a creature called "control" and an angel type simply called "Light"
The family turn out to be taken over, and almost manage to get Ace in their evil clutches
the creature known as Nimrod was my favorite, a being from another time and place
Eventually, the Doctor again outwits his nemesis