The TARDIS door swings open and the Doctor stands there, glaring down at the youth on the other side, some local juvenile delinquent trying to pick the lock.
“What exactly do you think you’re doing?”
“Nothin’! I weren’t doin’ nothin’! Whoa!” The boy catches sight of the TARDIS’ interior.
“You weren’t doing anything,” the Doctor corrects automatically, bushy eyebrows drawing together in disapproval. “What are they teaching young people these days?”
He gets no answer; the would-be thief’s eyes are popping out of his head.
“Well, don’t just stand there; come in!” Maybe a little remedial education is in order.