I say it's only a multiple Doctor story if the actor himself shows up, meaning flashbacks/projections/echoes don't count. (one exception being Eleven phoning Clara in The Time of the Doctor/Deep Breath)
I say it's only a multiple Doctor story if the actor himself shows up, meaning flashbacks/projections/echoes don't count. (one exception being Eleven phoning Clara in The Time of the Doctor/Deep Breath)