Jack grumps for another few seconds, squints around at the corridor, and straightens to give his neck a good crack. Or, wait, two. Not the best sleep he's had in the TARDIS, but he can't complain.

"Doctor," he greets. Then, because he is just so informed on the subject of the Doctor's sentient ship (no, really, he's Captain Jack Harkness), Jack puts in: "No, really, she is a sentient ship and she'll do that. Trust me." ...Cue some wall-stroking from the Captain, ahem. Not that he really knows what they're even talking about, honestly.