After the credits extra bonus scene

Sherlock's already raced on ahead mumbling something about missing suitcases when Donavan catches John on his way after his madman.

"So why did you marry him? Was it for a visa?" She asks her dislike of Sherlock obvious from her tone.

John licks his lips and draws himself up into a military stance.

"You know sometimes it amazes me how utterly dull people can be, I married him for the usual reason."

Donovan stares at him shocked.

"You don't actually care about that freak? Do you?"

"As a matter of fact, I do."

"What really? Why? He's a psychopath."

"No he's not. He's brilliant you might not be able to see that but he is."

He says pushing past her and trailing down the road after Sherlock.