...and the reason is you, and the reason is you.
THE DOCTOR & THE MASTER

DOCTOR WHO
“The Pyramid at the End of the World”

Two hearts, stupid clothes, you can’t miss him! Go on, scan the whole parsec, he’s not here! God knows where he is right now, but I promise you he’s doing whatever the hell he wants and not giving a damn about me, and I am just fine with that!
DOCTOR WHO — The Husbands of River Song (2015 Christmas Special)
directed by Douglas Mackinnon | written by Steven Moffat
››› Peter Capaldi as The Doctor
››› Alex Kingston as River Song