Inheritance was a fantastically interesting episode. At first I thought this was going to be yet another season 7 “hey, it’s a new family member because we ran out of ideas” episode, but this episode subverted those expectations. First of all the act, the actress, Fionnula Flanagan, did a perfect job of being believable but also in a way that made you wonder if she really was Data’s mother. Only a brilliant actor could do this and she nails this performance. And while the B-story of her planet needing the Enterprise to save its molten core was dumb, the final act in which we learn she was another android made after Data but doesn’t know she’s an android is a fantastic idea that gives Data a very difficult decision to have to make: tell her or not. This could have been a really bad episode, but great acting and a really good 4th act make this one of the better episodes of the whole series.