Like “Time Crash”?
http://www.youtube.com/watch?v=szuP0oBZX4g
Peter Davison (the fifth Doctor) and David Tennant (10th).
Loved this comment:
“Peter Davison had a daughter, actress Georgia Moffett, who played Jenny, the Doctors clone/daughter in “The Doctor’s Daughter”. She and David Tennant got together, got married, and now have a daughter of their own.
So the Doctors daughter who played the Doctors daughter in The Doctors Daughter married the Doctor and had the Doctors daughter and the Doctors grand-daughter...
Wibbley Wobbley Timey Whimey.....stuff.”
“Brave choice, a stick of celery”
Exactly! And great comment you found! :-)