The old

"Yes, what is it?" The Doctor said tersely.
A child was banging at his junkyard's doors.
"Young man," he continued, intending to chide the boy.
The boy rolled his eyes.
"Oh, come on," he blinked and the Doctor jumped.
"You're... me. I didn't realize I would get so young."
"After a few regeneration series..."
"You know, you've got it all. You're starting..," the boy stopped abruptly.
"Me? The future's boring, so I'm revisiting the past. This Chesterton, what do you see in him?"
"Who's Chesterton?"
"Sorry, you'll meet him later."
"But you should broaden this earthling's mind when you do."