"It's a long story... well, no, it's actually a story that lasted about a week, just repeated for a hell of a long time."

If Kain knew the story (or if the Doctor were currently willing to tell it) that statement would make perfect sense.

"If I had my ship here, I could pop everyone home to their proper times and places before tea."

He misses the TARDIS. Desperately. And not just because she could get him home...

"Oh, well, yes. There's one planet where it's more the cross of a finch and a house-cat. Though, the finch was a bit bigger than most people are used to and the cat a big smaller, but they were the griffons of that planet."