"There's a draft," the Doctor said, peering over the side of the console at Jack. "I'll get that fixed, then we'll see about me staying any sort of way for any length of time."

Which was nonsense, of course, because the TARDIS had no such air leaks or cold spells, unless she was angry at one of or both of them. Which she wasn't, the Doctor knew. She was cautiously relieved.

As was he.

"How're you feeling?" he asked.