The tannin smell was interupted by the beautiful wafting smell of possibly the strongest coffee ever created by humanity as Jack wandered into the kitchen to try and find something to have with it. Oh he kept the coffee maker in his room but sometimes it could do with just a little addition.
"Morning Doc" he said simply amused at the Time Lord looking at his tea as if it was some kind of wonderful magical thing. What it was, was weird.
"So you eventually crawled out of the lab? You know you've been in there most of the night, right? Do you even notice anymore?" Jack was honestly on some level curious if he did, or if days could have passed had he not had other people in the TARDIS with him.