[Perpetual Man]

Well my initial reaction was: What? Where? When? How?

But bringing up Susan is a brilliant point. She was always referred to and excepted as the Doctor's grandaughter (She stayed on Earth after the original Dalek Invasion after falling in love, in fact the Doctor left her behind because of this, so there could be great grandchildren etc....)

But obviously that would mean, if Susan was the Doctor's REAL daughter not adopted or anything there must be a parent around.

Stretching my memory as much as I can (!) There was a short story published in the Radio Times when it celebrated the show 20th or 25th Anniversary that explained the relationship between Susan and the Doctor.

On top of this I'm sure there are a few oblique mentions to his family in the Hartnell years.

The now hard to get last Virgin novel LUNGBARROW has quite a few mentions about the Doctor's genesis, but is not considered cannon.

I guess it depends how far back the writing team is going - because my initial thought before Susan was mentioned here was that it was something to do with the hand.