[PapaBear3625]

I think it would be a cool twist. They have already hinted that it has happened before in several seasons. They also have an open storyline out there with the Dr.’s clone/daughter who is a Time Lord.

The episode was entitled The Doctor's Daughter.

Tidbit: the woman who played the Doctor's daughter in that episode wound up marrying David Tennant (Doctor Who) in real life, and they have a daughter.

[mnehring]

Yep, and the other cool twist, the ‘daughter’ Jenny is actually the daughter of Peter Davison, the 5th doctor.

So the doctor married his own daughter. :->