[ How does the Doctor know Calendar Man's address? ~Reasons~ (he's a creep and hacked the system/badgered enough people until he finds out, that's how). Needless to say, KNOCK KNOCK KNOCK, the Doctor is just knocking on Calendar Man's door, bouncing up and down slightly. There's a small box in his hand, wrapped in airplane wrapping paper. ]
part two, sometime after the Russia business
Oh come onnnn, open up!