Mom: 1 of the doctors will be on the nerdist.
Me: which 1?
Mom: -points to my signed peter Davison picture-
Me: Peter Davison?
Mom: No, the 1 who wears bowties
Me: 11th, Matt Smith.
Mom: I get them confused.
Mom: Who's the youngest?
Me: Depends, do you mean the age when they played the character?
Me: Matt Smith, 11th is the youngest. Followed right behind by Peter Davison 5th who was the youngest actor to play the doctor in the classic series.