[ZenGum]

The Fifth Doctor from Doctor Who is played by Peter Davison. He had a daughter Georgia Moffet. Georgia played the fictional daughter of Doctor Who in an episode entitled The Doctor's Daughter. In that episode The Doctor is on his tenth incarnation played by David Tennant. While shooting that episode the two started to date and later had a daughter together who they named Olive.

So The Doctor's daughter from the Doctor Who episode The Doctor's Daughter is played by The Doctor's daughter who later goes on to marry The Doctor and give birth to The Doctor's daughter.

This is going to be in the test.