Ko I and Theta: A Day in the Life
Koschei had just returned from a trip, Mr. Holmes kept him almost a week longer than had been expected (and they definitely weren't doing any freelance for the Americans and that in no way involved the Winchester Brothers' cross-country killing spree, of course not) And he'd returned home. The Tube from Heathrow was filled, packed like sardines, with the scent of people.
Americans, Englishmen, Indians, you name an ethnic group and they were probably there. It was almost too much for the young time lord to handle, but he wanted to surprise his husband. If he took a taxi, Theta'd be sure to see him arrive. It would all be worth it to see the surprised look in his Theta's eyes.
40 minutes later, he rang the bell.