The Doctor ticked a little, mostly to himself, as he kept an arm around Idris. He couldn't very well blame her for not knowing what to do in the cold - had she even seen what his companions did whenever they were cold? Had she realized it for what it was, and not some sort of decoration? He frowned a little at the woman in worry. "You could catch a cold!" he scolded, although gently, getting to his feet and offering her his arm. "Beside, you know what snow is! I love snow!" He was pretty certain the TARDIS liked the snow, too, given the icy planets he landed on from time to time.

"Yuna's not a 'stray'," he told her. "She's a friend of mine. She came when I needed her help. She's very kind, I think you'll like her."