With his words, the Doctor immediately decided that yes, he did like Alan Jackson. Anyone who was willing to go out of their comfort zones and take the extra step to save the world earned extra points in the Doctor's Yes-I-Like-You book.
And he was protecting his daughter. The Doctor silently envied him that ability.
"Allons-y," he said, turning towards the UN building and starting off at a quick jog, hoping that finding Alan running to begin with meant he wasn't already gassed.