The Doctor laughs once, harshly, and drops his head –let the Master interpret that one however he likes– and so is almost unprepared when the change comes again. Fortunately, it’s much less agonizing in this direction.

When he’s himself again he climbs shakily –but no longer painfully– to his feet, and stands for a moment, just watching the Master, waiting for he’s not sure what. Then, sensing the grace that he has been given, he walks past the other and goes to Setsuna, crouching down at the boy’s side and drawing a concerned hand across the cut on his temple.