Daniel was hiding.
He had borne the journey back well. The jokes, the puns, the endless prodding in the infirmary. But Jack had known he would run at the first opportunity, back to his office, burying himself in work.
No point asking. Daniel was 'fine'. Of course. He was used to losing people. Used to them being stolen away, even though he was the most thoughtlessly kind person Jack had ever met. He was fine, despite losing last member of his family.
Almost the last.
Jack fixed a casual expression, hands in his pockets, and sauntered in without knocking.